/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/max-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:54:48,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:54:48,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:54:48,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:54:48,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 19:54:48,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 19:54:48,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 19:54:48,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 19:54:48,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 19:54:48,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 19:54:48,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 19:54:48,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 19:54:48,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 19:54:48,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 19:54:48,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 19:54:48,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 19:54:48,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 19:54:48,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-12 19:54:48,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-12 19:54:48,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-12 19:54:48,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-12 19:54:48,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-12 19:54:48,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-12 19:54:48,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-12 19:54:48,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2021-08-12 19:54:48,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 19:54:48,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:54:48,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:54:48,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:54:48,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:54:48,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:54:48,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:54:48,831 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:54:48,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:54:48,831 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:54:48,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:54:48,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:54:48,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:54:48,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:54:48,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:54:48,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:54:48,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:54:48,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:54:48,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:54:48,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:54:48,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:54:48,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:54:48,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:54:48,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:54:48,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:54:48,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:54:48,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:54:48,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:54:48,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:54:48,833 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:54:48,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:54:48,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:54:49,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:54:49,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:54:49,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:54:49,088 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:54:49,089 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:54:49,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl [2021-08-12 19:54:49,090 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl' [2021-08-12 19:54:49,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:54:49,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:54:49,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:54:49,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:54:49,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:54:49,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... [2021-08-12 19:54:49,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... [2021-08-12 19:54:49,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:54:49,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:54:49,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:54:49,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:54:49,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... [2021-08-12 19:54:49,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... [2021-08-12 19:54:49,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... [2021-08-12 19:54:49,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... [2021-08-12 19:54:49,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... [2021-08-12 19:54:49,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... [2021-08-12 19:54:49,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... [2021-08-12 19:54:49,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:54:49,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:54:49,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:54:49,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:54:49,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:54:49,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:54:49,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:54:49,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:54:49,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:54:49,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:54:49,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:54:49,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:54:49,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:54:49,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:54:49,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:54:49,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:54:49,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:54:49,234 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:54:49,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:54:49,361 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:54:49,362 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:54:49 BoogieIcfgContainer [2021-08-12 19:54:49,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:54:49,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:54:49,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:54:49,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:54:49,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:54:49" (1/2) ... [2021-08-12 19:54:49,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716912b2 and model type max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:54:49, skipping insertion in model container [2021-08-12 19:54:49,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:54:49" (2/2) ... [2021-08-12 19:54:49,367 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun.wvr.bpl [2021-08-12 19:54:49,370 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:54:49,371 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:54:49,371 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:54:49,410 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-12 19:54:49,424 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 19:54:49,436 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:54:49,436 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:54:49,436 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:54:49,436 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:54:49,436 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:54:49,436 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:54:49,436 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:54:49,436 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:54:49,442 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-12 19:54:49,460 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:54:49,468 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:49,468 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:49,469 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:49,472 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-08-12 19:54:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:49,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966384178] [2021-08-12 19:54:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:49,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:49,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966384178] [2021-08-12 19:54:49,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966384178] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:54:49,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:54:49,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:54:49,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363560236] [2021-08-12 19:54:49,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:54:49,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:49,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:54:49,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:54:49,592 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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) [2021-08-12 19:54:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:49,632 INFO L93 Difference]: Finished difference Result 221 states and 622 transitions. [2021-08-12 19:54:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:54:49,633 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 [2021-08-12 19:54:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:49,641 INFO L225 Difference]: With dead ends: 221 [2021-08-12 19:54:49,641 INFO L226 Difference]: Without dead ends: 202 [2021-08-12 19:54:49,643 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:54:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-12 19:54:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-08-12 19:54:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-08-12 19:54:49,677 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-08-12 19:54:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:49,678 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-08-12 19:54:49,678 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) [2021-08-12 19:54:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-08-12 19:54:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:54:49,680 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:49,680 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:49,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:54:49,680 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-08-12 19:54:49,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:49,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353317861] [2021-08-12 19:54:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:54:49,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:49,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353317861] [2021-08-12 19:54:49,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353317861] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:54:49,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:54:49,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:54:49,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769890849] [2021-08-12 19:54:49,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:54:49,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:49,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:54:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:54:49,718 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:49,789 INFO L93 Difference]: Finished difference Result 215 states and 608 transitions. [2021-08-12 19:54:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:54:49,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:54:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:49,792 INFO L225 Difference]: With dead ends: 215 [2021-08-12 19:54:49,793 INFO L226 Difference]: Without dead ends: 158 [2021-08-12 19:54:49,793 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:54:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-12 19:54:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-08-12 19:54:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-12 19:54:49,813 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-08-12 19:54:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:49,814 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-12 19:54:49,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-12 19:54:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:54:49,818 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:49,818 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:49,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:54:49,819 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:49,820 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-08-12 19:54:49,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:49,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382839472] [2021-08-12 19:54:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:54:49,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:49,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382839472] [2021-08-12 19:54:49,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382839472] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:54:49,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:54:49,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:54:49,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338050067] [2021-08-12 19:54:49,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:54:49,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:49,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:54:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:54:49,875 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:49,929 INFO L93 Difference]: Finished difference Result 261 states and 743 transitions. [2021-08-12 19:54:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:54:49,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:54:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:49,946 INFO L225 Difference]: With dead ends: 261 [2021-08-12 19:54:49,946 INFO L226 Difference]: Without dead ends: 183 [2021-08-12 19:54:49,947 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:54:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-12 19:54:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-08-12 19:54:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-12 19:54:49,957 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-12 19:54:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:49,957 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-12 19:54:49,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:49,957 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-12 19:54:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:54:49,958 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:49,958 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:49,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:54:49,958 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:49,959 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-08-12 19:54:49,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:49,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138639725] [2021-08-12 19:54:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:50,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:50,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138639725] [2021-08-12 19:54:50,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138639725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:50,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269594786] [2021-08-12 19:54:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:50,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:54:50,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:50,561 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 21 treesize of output 13 [2021-08-12 19:54:50,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:50,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-12 19:54:50,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:50,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-12 19:54:50,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:50,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:50,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:54:50,586 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-08-12 19:54:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:50,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269594786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:50,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:50,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:54:50,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498602276] [2021-08-12 19:54:50,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:54:50,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:54:50,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:54:50,641 INFO L87 Difference]: Start difference. First operand 158 states and 448 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) [2021-08-12 19:54:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:50,887 INFO L93 Difference]: Finished difference Result 332 states and 937 transitions. [2021-08-12 19:54:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:54:50,887 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 22 [2021-08-12 19:54:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:50,889 INFO L225 Difference]: With dead ends: 332 [2021-08-12 19:54:50,889 INFO L226 Difference]: Without dead ends: 315 [2021-08-12 19:54:50,890 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:54:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-12 19:54:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-12 19:54:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-12 19:54:50,901 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-12 19:54:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:50,901 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-12 19:54:50,901 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) [2021-08-12 19:54:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-12 19:54:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:54:50,902 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:50,902 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:51,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:51,119 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:51,119 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-08-12 19:54:51,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:51,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403932273] [2021-08-12 19:54:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:51,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:51,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403932273] [2021-08-12 19:54:51,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403932273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:51,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024409557] [2021-08-12 19:54:51,367 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:51,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:54:51,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:51,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:54:51,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:51,639 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:54:51,639 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 16 treesize of output 14 [2021-08-12 19:54:51,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:51,662 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:54:51,663 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 16 treesize of output 14 [2021-08-12 19:54:51,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:51,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:51,672 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 21 treesize of output 21 [2021-08-12 19:54:51,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:51,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:51,685 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 [2021-08-12 19:54:51,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:51,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:51,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 19:54:51,771 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-08-12 19:54:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:51,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024409557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:51,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:51,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-12 19:54:51,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777477001] [2021-08-12 19:54:51,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:54:51,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:54:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:54:51,929 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-12 19:54:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:52,448 INFO L93 Difference]: Finished difference Result 376 states and 1079 transitions. [2021-08-12 19:54:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:54:52,448 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 22 [2021-08-12 19:54:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:52,450 INFO L225 Difference]: With dead ends: 376 [2021-08-12 19:54:52,450 INFO L226 Difference]: Without dead ends: 359 [2021-08-12 19:54:52,451 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:54:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-12 19:54:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-08-12 19:54:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-12 19:54:52,461 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-12 19:54:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:52,461 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-12 19:54:52,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-12 19:54:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-12 19:54:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:54:52,462 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:52,462 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:52,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:52,678 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:52,678 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-08-12 19:54:52,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:52,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389379321] [2021-08-12 19:54:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:52,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:52,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389379321] [2021-08-12 19:54:52,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389379321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:52,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156154819] [2021-08-12 19:54:52,830 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 [2021-08-12 19:54:52,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:54:52,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:52,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:54:52,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:52,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-12 19:54:52,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:52,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-12 19:54:52,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:52,972 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 21 treesize of output 13 [2021-08-12 19:54:52,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:52,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-12 19:54:52,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:52,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:54:52,979 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:52,981 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 21 treesize of output 13 [2021-08-12 19:54:52,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:53,002 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-08-12 19:54:53,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:54:53,002 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-08-12 19:54:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:53,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156154819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:53,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:53,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:54:53,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100355204] [2021-08-12 19:54:53,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:54:53,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:53,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:54:53,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:54:53,034 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:53,192 INFO L93 Difference]: Finished difference Result 298 states and 833 transitions. [2021-08-12 19:54:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:54:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 22 [2021-08-12 19:54:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:53,194 INFO L225 Difference]: With dead ends: 298 [2021-08-12 19:54:53,194 INFO L226 Difference]: Without dead ends: 281 [2021-08-12 19:54:53,194 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:54:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-12 19:54:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-08-12 19:54:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-12 19:54:53,204 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-12 19:54:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:53,204 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-12 19:54:53,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-12 19:54:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:54:53,205 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:53,205 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:53,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-12 19:54:53,423 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:53,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-08-12 19:54:53,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:53,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157621273] [2021-08-12 19:54:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:53,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:53,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157621273] [2021-08-12 19:54:53,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157621273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:53,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373750193] [2021-08-12 19:54:53,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:53,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:54:53,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:54:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:53,795 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:54:53,796 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 16 treesize of output 14 [2021-08-12 19:54:53,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:53,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:53,803 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 [2021-08-12 19:54:53,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:53,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:53,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:53,861 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 21 treesize of output 21 [2021-08-12 19:54:53,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:53,870 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:54:53,870 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 16 treesize of output 14 [2021-08-12 19:54:53,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:53,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:53,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 19:54:53,925 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-08-12 19:54:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:54,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373750193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:54,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:54,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:54:54,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750500839] [2021-08-12 19:54:54,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:54:54,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:54:54,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:54:54,031 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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) [2021-08-12 19:54:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:54,381 INFO L93 Difference]: Finished difference Result 411 states and 1187 transitions. [2021-08-12 19:54:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:54:54,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 22 [2021-08-12 19:54:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:54,384 INFO L225 Difference]: With dead ends: 411 [2021-08-12 19:54:54,384 INFO L226 Difference]: Without dead ends: 394 [2021-08-12 19:54:54,384 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:54:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-12 19:54:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-08-12 19:54:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-12 19:54:54,396 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-12 19:54:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:54,396 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-12 19:54:54,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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) [2021-08-12 19:54:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-12 19:54:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:54:54,397 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:54,397 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:54,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:54,613 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-08-12 19:54:54,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:54,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762185011] [2021-08-12 19:54:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:54,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:54,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762185011] [2021-08-12 19:54:54,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762185011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:54,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253829883] [2021-08-12 19:54:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:54,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:54:54,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:54,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:54:54,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:54,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253829883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:54,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:54,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:54:54,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090760334] [2021-08-12 19:54:54,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:54:54,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:54,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:54:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:54:54,781 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-08-12 19:54:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:55,119 INFO L93 Difference]: Finished difference Result 644 states and 1840 transitions. [2021-08-12 19:54:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:54:55,120 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 [2021-08-12 19:54:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:55,122 INFO L225 Difference]: With dead ends: 644 [2021-08-12 19:54:55,122 INFO L226 Difference]: Without dead ends: 619 [2021-08-12 19:54:55,123 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:54:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-12 19:54:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-12 19:54:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-12 19:54:55,140 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-12 19:54:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:55,140 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-12 19:54:55,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-08-12 19:54:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-12 19:54:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:54:55,141 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:55,141 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:55,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-12 19:54:55,359 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-08-12 19:54:55,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:55,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360807215] [2021-08-12 19:54:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:55,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:55,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360807215] [2021-08-12 19:54:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360807215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:55,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427393308] [2021-08-12 19:54:55,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:55,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:54:55,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:55,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:54:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:55,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427393308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:55,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:55,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:54:55,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246120954] [2021-08-12 19:54:55,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:54:55,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:54:55,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:54:55,497 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:54:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:56,221 INFO L93 Difference]: Finished difference Result 1103 states and 3056 transitions. [2021-08-12 19:54:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:54:56,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 [2021-08-12 19:54:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:56,226 INFO L225 Difference]: With dead ends: 1103 [2021-08-12 19:54:56,226 INFO L226 Difference]: Without dead ends: 1078 [2021-08-12 19:54:56,227 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:54:56,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-12 19:54:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-12 19:54:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-12 19:54:56,251 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-12 19:54:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:56,251 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-12 19:54:56,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:54:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-12 19:54:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:54:56,253 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:56,253 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:56,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:56,469 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:56,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-08-12 19:54:56,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:56,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175117167] [2021-08-12 19:54:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:56,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:56,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175117167] [2021-08-12 19:54:56,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175117167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:56,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367111338] [2021-08-12 19:54:56,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:56,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:54:56,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:56,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367111338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:56,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:56,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:54:56,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324992620] [2021-08-12 19:54:56,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:54:56,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:54:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:54:56,605 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:54:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:57,319 INFO L93 Difference]: Finished difference Result 976 states and 2754 transitions. [2021-08-12 19:54:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 19:54:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 [2021-08-12 19:54:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:57,323 INFO L225 Difference]: With dead ends: 976 [2021-08-12 19:54:57,324 INFO L226 Difference]: Without dead ends: 951 [2021-08-12 19:54:57,324 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:54:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-12 19:54:57,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-12 19:54:57,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-12 19:54:57,348 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-12 19:54:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:57,348 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-12 19:54:57,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:54:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-12 19:54:57,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:54:57,349 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:57,350 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:57,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:57,583 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-08-12 19:54:57,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:57,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370061706] [2021-08-12 19:54:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:54:57,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:57,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370061706] [2021-08-12 19:54:57,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370061706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:57,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761047922] [2021-08-12 19:54:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:54:57,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:54:57,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761047922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:57,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:57,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 19:54:57,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6025613] [2021-08-12 19:54:57,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:54:57,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:57,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:54:57,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:54:57,680 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:57,850 INFO L93 Difference]: Finished difference Result 745 states and 2187 transitions. [2021-08-12 19:54:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:54:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:54:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:57,853 INFO L225 Difference]: With dead ends: 745 [2021-08-12 19:54:57,853 INFO L226 Difference]: Without dead ends: 663 [2021-08-12 19:54:57,854 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:54:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-12 19:54:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-12 19:54:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-12 19:54:57,878 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-12 19:54:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:57,878 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-12 19:54:57,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-12 19:54:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:54:57,879 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:57,879 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:58,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 19:54:58,094 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:58,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-08-12 19:54:58,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:58,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541806412] [2021-08-12 19:54:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:58,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:58,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541806412] [2021-08-12 19:54:58,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541806412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:58,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937025965] [2021-08-12 19:54:58,127 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:58,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:54:58,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:58,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:54:58,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:58,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937025965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:58,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:58,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:54:58,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844536974] [2021-08-12 19:54:58,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:54:58,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:58,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:54:58,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:54:58,214 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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) [2021-08-12 19:54:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:58,460 INFO L93 Difference]: Finished difference Result 765 states and 2274 transitions. [2021-08-12 19:54:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:54:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 24 [2021-08-12 19:54:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:58,463 INFO L225 Difference]: With dead ends: 765 [2021-08-12 19:54:58,463 INFO L226 Difference]: Without dead ends: 672 [2021-08-12 19:54:58,464 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:54:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-12 19:54:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-12 19:54:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-12 19:54:58,495 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-12 19:54:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:58,495 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-12 19:54:58,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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) [2021-08-12 19:54:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-12 19:54:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:54:58,496 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:58,496 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:58,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:58,713 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-08-12 19:54:58,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:58,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316446675] [2021-08-12 19:54:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:54:58,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:58,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316446675] [2021-08-12 19:54:58,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316446675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:58,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507016896] [2021-08-12 19:54:58,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 19:54:58,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:54:58,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:58,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:54:58,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:54:58,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507016896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:58,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:58,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 19:54:58,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684489394] [2021-08-12 19:54:58,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:54:58,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:54:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:54:58,813 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:59,025 INFO L93 Difference]: Finished difference Result 966 states and 2852 transitions. [2021-08-12 19:54:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:54:59,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:54:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:59,029 INFO L225 Difference]: With dead ends: 966 [2021-08-12 19:54:59,029 INFO L226 Difference]: Without dead ends: 830 [2021-08-12 19:54:59,029 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:54:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-12 19:54:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-12 19:54:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-12 19:54:59,063 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-12 19:54:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:59,063 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-12 19:54:59,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-12 19:54:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:54:59,064 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:59,064 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:59,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 19:54:59,281 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:59,281 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-08-12 19:54:59,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:59,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011701276] [2021-08-12 19:54:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:59,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:59,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011701276] [2021-08-12 19:54:59,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011701276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:59,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017658537] [2021-08-12 19:54:59,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:59,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:54:59,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:54:59,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:59,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017658537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:59,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:59,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:54:59,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168031669] [2021-08-12 19:54:59,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:54:59,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:59,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:54:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:54:59,386 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:59,822 INFO L93 Difference]: Finished difference Result 1221 states and 3556 transitions. [2021-08-12 19:54:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:54:59,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:54:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:59,827 INFO L225 Difference]: With dead ends: 1221 [2021-08-12 19:54:59,827 INFO L226 Difference]: Without dead ends: 1196 [2021-08-12 19:54:59,827 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:54:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-12 19:54:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-12 19:54:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-12 19:54:59,889 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-12 19:54:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:59,889 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-12 19:54:59,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-12 19:54:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:54:59,890 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:59,890 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:00,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 19:55:00,107 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:00,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:00,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-08-12 19:55:00,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:00,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953222525] [2021-08-12 19:55:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:00,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953222525] [2021-08-12 19:55:00,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953222525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550891188] [2021-08-12 19:55:00,136 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:00,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:55:00,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:00,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:00,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550891188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:00,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:00,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:55:00,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762609621] [2021-08-12 19:55:00,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:55:00,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:00,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:55:00,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:55:00,241 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:01,022 INFO L93 Difference]: Finished difference Result 1517 states and 4304 transitions. [2021-08-12 19:55:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 19:55:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:55:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:01,047 INFO L225 Difference]: With dead ends: 1517 [2021-08-12 19:55:01,047 INFO L226 Difference]: Without dead ends: 1492 [2021-08-12 19:55:01,049 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:55:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-12 19:55:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-12 19:55:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-12 19:55:01,142 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-12 19:55:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:01,142 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-12 19:55:01,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-12 19:55:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:01,144 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:01,144 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:01,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 19:55:01,372 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:01,373 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-08-12 19:55:01,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:01,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232704008] [2021-08-12 19:55:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:01,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:01,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232704008] [2021-08-12 19:55:01,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232704008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:01,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500366101] [2021-08-12 19:55:01,420 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:01,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:55:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:01,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:01,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500366101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:01,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:01,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:55:01,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888687582] [2021-08-12 19:55:01,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:01,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:01,577 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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) [2021-08-12 19:55:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:02,033 INFO L93 Difference]: Finished difference Result 1363 states and 4072 transitions. [2021-08-12 19:55:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:55:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 24 [2021-08-12 19:55:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:02,039 INFO L225 Difference]: With dead ends: 1363 [2021-08-12 19:55:02,039 INFO L226 Difference]: Without dead ends: 1248 [2021-08-12 19:55:02,039 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:55:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-12 19:55:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-12 19:55:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-12 19:55:02,135 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-12 19:55:02,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:02,135 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-12 19:55:02,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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) [2021-08-12 19:55:02,135 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-12 19:55:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:02,137 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:02,137 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:02,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-12 19:55:02,354 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:02,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-08-12 19:55:02,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:02,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427822034] [2021-08-12 19:55:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:02,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:02,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427822034] [2021-08-12 19:55:02,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427822034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:02,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836840996] [2021-08-12 19:55:02,392 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:02,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:55:02,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:02,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:02,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:02,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836840996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:02,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:02,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:55:02,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170805010] [2021-08-12 19:55:02,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:02,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:02,596 INFO L87 Difference]: Start difference. First operand 758 states and 2441 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) [2021-08-12 19:55:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:03,241 INFO L93 Difference]: Finished difference Result 1408 states and 4261 transitions. [2021-08-12 19:55:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:55:03,242 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 [2021-08-12 19:55:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:03,250 INFO L225 Difference]: With dead ends: 1408 [2021-08-12 19:55:03,250 INFO L226 Difference]: Without dead ends: 1329 [2021-08-12 19:55:03,251 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:55:03,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-12 19:55:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-12 19:55:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-12 19:55:03,332 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-12 19:55:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:03,332 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-12 19:55:03,332 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) [2021-08-12 19:55:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-12 19:55:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:03,334 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:03,334 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:03,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:03,555 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-08-12 19:55:03,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:03,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672887479] [2021-08-12 19:55:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:03,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:03,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672887479] [2021-08-12 19:55:03,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672887479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:03,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329353680] [2021-08-12 19:55:03,597 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:03,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:03,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329353680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:03,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:03,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:55:03,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638514079] [2021-08-12 19:55:03,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:55:03,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:03,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:55:03,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:55:03,679 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:04,387 INFO L93 Difference]: Finished difference Result 1573 states and 4696 transitions. [2021-08-12 19:55:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:55:04,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:55:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:04,399 INFO L225 Difference]: With dead ends: 1573 [2021-08-12 19:55:04,399 INFO L226 Difference]: Without dead ends: 1544 [2021-08-12 19:55:04,400 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:55:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-12 19:55:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-12 19:55:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-12 19:55:04,487 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-12 19:55:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:04,487 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-12 19:55:04,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-12 19:55:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:04,489 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:04,490 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:04,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:04,713 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:04,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:04,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-08-12 19:55:04,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:04,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598027755] [2021-08-12 19:55:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:04,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:04,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598027755] [2021-08-12 19:55:04,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598027755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:04,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457010317] [2021-08-12 19:55:04,758 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:04,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:55:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:04,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:04,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:04,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457010317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:04,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:04,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:04,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211804194] [2021-08-12 19:55:04,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:04,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:04,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:04,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:04,872 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:55:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:06,254 INFO L93 Difference]: Finished difference Result 2759 states and 8237 transitions. [2021-08-12 19:55:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 19:55:06,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 [2021-08-12 19:55:06,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:06,265 INFO L225 Difference]: With dead ends: 2759 [2021-08-12 19:55:06,266 INFO L226 Difference]: Without dead ends: 2734 [2021-08-12 19:55:06,267 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:55:06,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-12 19:55:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-12 19:55:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-12 19:55:06,362 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-12 19:55:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:06,362 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-12 19:55:06,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:55:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-12 19:55:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:06,365 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:06,365 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:06,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:06,581 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:06,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-08-12 19:55:06,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:06,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087945213] [2021-08-12 19:55:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:06,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:06,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087945213] [2021-08-12 19:55:06,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087945213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:06,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229363247] [2021-08-12 19:55:06,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:06,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:55:06,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:06,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:06,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229363247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:06,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:06,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:06,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922620692] [2021-08-12 19:55:06,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:06,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:06,737 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:55:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:08,297 INFO L93 Difference]: Finished difference Result 2718 states and 8127 transitions. [2021-08-12 19:55:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 19:55:08,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 [2021-08-12 19:55:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:08,331 INFO L225 Difference]: With dead ends: 2718 [2021-08-12 19:55:08,331 INFO L226 Difference]: Without dead ends: 2693 [2021-08-12 19:55:08,332 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 461.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:55:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-12 19:55:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-12 19:55:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-12 19:55:08,468 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-12 19:55:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:08,468 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-12 19:55:08,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:55:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-12 19:55:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:08,470 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:08,470 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:08,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-12 19:55:08,689 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-08-12 19:55:08,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:08,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569443264] [2021-08-12 19:55:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:08,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569443264] [2021-08-12 19:55:08,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569443264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711115169] [2021-08-12 19:55:08,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:08,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:55:08,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:08,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:08,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:08,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711115169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:08,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:08,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:55:08,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767861386] [2021-08-12 19:55:08,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:55:08,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:08,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:55:08,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:55:08,855 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:10,240 INFO L93 Difference]: Finished difference Result 2702 states and 7881 transitions. [2021-08-12 19:55:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:55:10,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-08-12 19:55:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:10,247 INFO L225 Difference]: With dead ends: 2702 [2021-08-12 19:55:10,247 INFO L226 Difference]: Without dead ends: 2677 [2021-08-12 19:55:10,248 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 19:55:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-12 19:55:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-12 19:55:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-12 19:55:10,382 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-12 19:55:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:10,382 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-12 19:55:10,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-12 19:55:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:10,385 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:10,385 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:10,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-12 19:55:10,587 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-08-12 19:55:10,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:10,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348359074] [2021-08-12 19:55:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:10,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:10,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348359074] [2021-08-12 19:55:10,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348359074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:10,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081288200] [2021-08-12 19:55:10,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:10,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:55:10,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:10,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:10,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081288200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:10,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:10,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:55:10,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086990795] [2021-08-12 19:55:10,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:55:10,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:10,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:55:10,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:55:10,724 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:12,131 INFO L93 Difference]: Finished difference Result 2499 states and 7378 transitions. [2021-08-12 19:55:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 19:55:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-08-12 19:55:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:12,138 INFO L225 Difference]: With dead ends: 2499 [2021-08-12 19:55:12,138 INFO L226 Difference]: Without dead ends: 2470 [2021-08-12 19:55:12,139 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:55:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-12 19:55:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-12 19:55:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-12 19:55:12,283 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-12 19:55:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:12,283 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-12 19:55:12,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-12 19:55:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:12,285 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:12,286 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:12,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 19:55:12,505 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:12,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-08-12 19:55:12,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:12,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047389058] [2021-08-12 19:55:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:12,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:12,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047389058] [2021-08-12 19:55:12,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047389058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:12,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49850133] [2021-08-12 19:55:12,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:12,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:55:12,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:12,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:12,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49850133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:12,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:12,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:12,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771627111] [2021-08-12 19:55:12,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:12,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:12,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:12,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:12,663 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:14,141 INFO L93 Difference]: Finished difference Result 2539 states and 7492 transitions. [2021-08-12 19:55:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 19:55:14,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-12 19:55:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:14,148 INFO L225 Difference]: With dead ends: 2539 [2021-08-12 19:55:14,149 INFO L226 Difference]: Without dead ends: 2514 [2021-08-12 19:55:14,149 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:55:14,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-12 19:55:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-12 19:55:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-12 19:55:14,249 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-12 19:55:14,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:14,250 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-12 19:55:14,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:14,250 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-12 19:55:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:14,252 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:14,252 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:14,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 19:55:14,465 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:14,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-08-12 19:55:14,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:14,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396649745] [2021-08-12 19:55:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:14,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:14,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396649745] [2021-08-12 19:55:14,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396649745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:14,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731911576] [2021-08-12 19:55:14,513 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:14,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:14,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731911576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:14,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:14,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:14,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957049822] [2021-08-12 19:55:14,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:14,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:14,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:14,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:14,596 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:15,973 INFO L93 Difference]: Finished difference Result 2357 states and 7054 transitions. [2021-08-12 19:55:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:55:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-12 19:55:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:15,980 INFO L225 Difference]: With dead ends: 2357 [2021-08-12 19:55:15,980 INFO L226 Difference]: Without dead ends: 2328 [2021-08-12 19:55:15,981 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:55:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-12 19:55:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-12 19:55:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-12 19:55:16,088 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-12 19:55:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:16,089 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-12 19:55:16,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-12 19:55:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:16,090 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:16,090 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:16,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-12 19:55:16,312 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:16,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-08-12 19:55:16,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:16,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312305305] [2021-08-12 19:55:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:55:16,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:16,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312305305] [2021-08-12 19:55:16,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312305305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:16,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958255557] [2021-08-12 19:55:16,336 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:16,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:55:16,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:16,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:55:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:55:16,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958255557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:16,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:16,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 19:55:16,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803516293] [2021-08-12 19:55:16,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:55:16,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:55:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:55:16,412 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:16,756 INFO L93 Difference]: Finished difference Result 1005 states and 3240 transitions. [2021-08-12 19:55:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:55:16,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:55:16,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:16,759 INFO L225 Difference]: With dead ends: 1005 [2021-08-12 19:55:16,759 INFO L226 Difference]: Without dead ends: 929 [2021-08-12 19:55:16,760 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:55:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-12 19:55:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-12 19:55:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-12 19:55:16,843 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-12 19:55:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:16,843 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-12 19:55:16,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-12 19:55:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:16,845 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:16,845 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:17,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:17,066 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-08-12 19:55:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:17,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310213660] [2021-08-12 19:55:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:17,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:17,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310213660] [2021-08-12 19:55:17,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310213660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:17,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307552149] [2021-08-12 19:55:17,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:17,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:55:17,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:17,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307552149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:17,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:17,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:55:17,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060504682] [2021-08-12 19:55:17,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:55:17,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:17,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:55:17,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:55:17,172 INFO L87 Difference]: Start difference. First operand 780 states and 2573 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) [2021-08-12 19:55:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:18,057 INFO L93 Difference]: Finished difference Result 1580 states and 4827 transitions. [2021-08-12 19:55:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:55:18,058 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 24 [2021-08-12 19:55:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:18,060 INFO L225 Difference]: With dead ends: 1580 [2021-08-12 19:55:18,061 INFO L226 Difference]: Without dead ends: 1555 [2021-08-12 19:55:18,061 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:55:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-12 19:55:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-12 19:55:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-12 19:55:18,175 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-12 19:55:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:18,175 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-12 19:55:18,175 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) [2021-08-12 19:55:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-12 19:55:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:18,177 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:18,177 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:18,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:18,397 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:18,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:18,398 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-08-12 19:55:18,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:18,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148796936] [2021-08-12 19:55:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:18,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:18,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148796936] [2021-08-12 19:55:18,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148796936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:18,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615728513] [2021-08-12 19:55:18,438 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 [2021-08-12 19:55:18,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:55:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:18,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:18,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615728513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:18,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:18,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:55:18,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520905755] [2021-08-12 19:55:18,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:55:18,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:55:18,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:55:18,508 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-08-12 19:55:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:19,355 INFO L93 Difference]: Finished difference Result 1630 states and 4954 transitions. [2021-08-12 19:55:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:55:19,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-08-12 19:55:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:19,359 INFO L225 Difference]: With dead ends: 1630 [2021-08-12 19:55:19,359 INFO L226 Difference]: Without dead ends: 1605 [2021-08-12 19:55:19,359 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:55:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-12 19:55:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-12 19:55:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-12 19:55:19,465 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-12 19:55:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:19,465 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-12 19:55:19,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-08-12 19:55:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-12 19:55:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:19,466 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:19,466 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:19,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:19,683 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-08-12 19:55:19,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:19,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800578744] [2021-08-12 19:55:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:55:19,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:19,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800578744] [2021-08-12 19:55:19,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800578744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:19,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094842669] [2021-08-12 19:55:19,711 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 [2021-08-12 19:55:19,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:55:19,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:19,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:19,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:55:19,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094842669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:19,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:19,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:55:19,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154194991] [2021-08-12 19:55:19,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:55:19,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:55:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:55:19,777 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-08-12 19:55:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:20,569 INFO L93 Difference]: Finished difference Result 1549 states and 4744 transitions. [2021-08-12 19:55:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:55:20,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-08-12 19:55:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:20,573 INFO L225 Difference]: With dead ends: 1549 [2021-08-12 19:55:20,573 INFO L226 Difference]: Without dead ends: 1520 [2021-08-12 19:55:20,573 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:55:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-12 19:55:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-12 19:55:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-12 19:55:20,694 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-12 19:55:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:20,694 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-12 19:55:20,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-08-12 19:55:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-12 19:55:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:20,696 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:20,696 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:20,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-12 19:55:20,901 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:20,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-08-12 19:55:20,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:20,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261485827] [2021-08-12 19:55:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:20,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:20,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261485827] [2021-08-12 19:55:20,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261485827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:20,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293968594] [2021-08-12 19:55:20,931 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 [2021-08-12 19:55:20,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:55:20,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:20,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:20,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:20,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293968594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:20,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:20,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:55:20,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467145591] [2021-08-12 19:55:20,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:55:20,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:55:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:55:20,992 INFO L87 Difference]: Start difference. First operand 896 states and 2943 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) [2021-08-12 19:55:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:21,888 INFO L93 Difference]: Finished difference Result 1533 states and 4706 transitions. [2021-08-12 19:55:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:55:21,889 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 24 [2021-08-12 19:55:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:21,892 INFO L225 Difference]: With dead ends: 1533 [2021-08-12 19:55:21,892 INFO L226 Difference]: Without dead ends: 1496 [2021-08-12 19:55:21,893 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:55:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-12 19:55:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-12 19:55:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-12 19:55:21,992 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-12 19:55:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:21,992 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-12 19:55:21,992 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) [2021-08-12 19:55:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-12 19:55:22,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:22,002 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:22,002 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:22,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:22,218 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:22,219 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-08-12 19:55:22,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:22,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963740697] [2021-08-12 19:55:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:22,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963740697] [2021-08-12 19:55:22,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963740697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442158496] [2021-08-12 19:55:22,253 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 [2021-08-12 19:55:22,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:55:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:22,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442158496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:22,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:22,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:22,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479887399] [2021-08-12 19:55:22,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:22,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:22,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:22,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:22,423 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:55:23,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:23,876 INFO L93 Difference]: Finished difference Result 2437 states and 7628 transitions. [2021-08-12 19:55:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:55:23,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 [2021-08-12 19:55:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:23,880 INFO L225 Difference]: With dead ends: 2437 [2021-08-12 19:55:23,880 INFO L226 Difference]: Without dead ends: 2412 [2021-08-12 19:55:23,881 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:55:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-12 19:55:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-12 19:55:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-12 19:55:23,997 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-12 19:55:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:23,997 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-12 19:55:23,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:55:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-12 19:55:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:23,999 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:23,999 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:24,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-12 19:55:24,213 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-08-12 19:55:24,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:24,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458018570] [2021-08-12 19:55:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:24,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:24,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458018570] [2021-08-12 19:55:24,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458018570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:24,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818559668] [2021-08-12 19:55:24,250 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:24,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:24,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818559668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:24,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:24,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:24,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962903805] [2021-08-12 19:55:24,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:24,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:24,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:24,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:24,349 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:55:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:26,015 INFO L93 Difference]: Finished difference Result 2360 states and 7430 transitions. [2021-08-12 19:55:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:55:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 [2021-08-12 19:55:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:26,020 INFO L225 Difference]: With dead ends: 2360 [2021-08-12 19:55:26,020 INFO L226 Difference]: Without dead ends: 2335 [2021-08-12 19:55:26,020 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:55:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-12 19:55:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-12 19:55:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-12 19:55:26,144 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-12 19:55:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:26,144 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-12 19:55:26,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-08-12 19:55:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-12 19:55:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:26,146 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:26,146 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:26,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:26,347 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:26,348 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-08-12 19:55:26,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:26,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961437959] [2021-08-12 19:55:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:26,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:26,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961437959] [2021-08-12 19:55:26,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961437959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:26,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496354070] [2021-08-12 19:55:26,394 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:26,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:55:26,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:26,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:26,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496354070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:26,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:26,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:55:26,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520027801] [2021-08-12 19:55:26,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:55:26,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:26,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:55:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:55:26,480 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:27,953 INFO L93 Difference]: Finished difference Result 2310 states and 7184 transitions. [2021-08-12 19:55:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:55:27,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-08-12 19:55:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:27,958 INFO L225 Difference]: With dead ends: 2310 [2021-08-12 19:55:27,959 INFO L226 Difference]: Without dead ends: 2285 [2021-08-12 19:55:27,959 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:55:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-12 19:55:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-12 19:55:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-12 19:55:28,119 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-12 19:55:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:28,120 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-12 19:55:28,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-12 19:55:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:28,122 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:28,122 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:28,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-12 19:55:28,336 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-08-12 19:55:28,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:28,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441782239] [2021-08-12 19:55:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:28,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:28,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441782239] [2021-08-12 19:55:28,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441782239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:28,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51884026] [2021-08-12 19:55:28,370 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:28,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:55:28,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:28,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:28,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51884026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:28,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:28,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:55:28,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083103899] [2021-08-12 19:55:28,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:55:28,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:28,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:55:28,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:55:28,465 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:30,006 INFO L93 Difference]: Finished difference Result 2201 states and 6903 transitions. [2021-08-12 19:55:30,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:55:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-08-12 19:55:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:30,012 INFO L225 Difference]: With dead ends: 2201 [2021-08-12 19:55:30,012 INFO L226 Difference]: Without dead ends: 2172 [2021-08-12 19:55:30,013 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:55:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-12 19:55:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-12 19:55:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-12 19:55:30,148 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-12 19:55:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:30,148 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-12 19:55:30,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-12 19:55:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:30,150 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:30,150 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:30,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:30,366 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:30,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-08-12 19:55:30,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:30,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518043222] [2021-08-12 19:55:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:30,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:30,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518043222] [2021-08-12 19:55:30,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518043222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:30,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282527708] [2021-08-12 19:55:30,399 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:30,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:55:30,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:30,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:30,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:30,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282527708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:30,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:30,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:30,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471832065] [2021-08-12 19:55:30,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:30,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:30,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:30,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:30,519 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:31,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:31,873 INFO L93 Difference]: Finished difference Result 2224 states and 6951 transitions. [2021-08-12 19:55:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:55:31,874 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-12 19:55:31,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:31,877 INFO L225 Difference]: With dead ends: 2224 [2021-08-12 19:55:31,877 INFO L226 Difference]: Without dead ends: 2199 [2021-08-12 19:55:31,878 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:55:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-12 19:55:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-12 19:55:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-12 19:55:31,993 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-12 19:55:31,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:31,993 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-12 19:55:31,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-12 19:55:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:31,994 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:31,994 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:32,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-12 19:55:32,209 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-08-12 19:55:32,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:32,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493572670] [2021-08-12 19:55:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:32,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:32,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493572670] [2021-08-12 19:55:32,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493572670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538319136] [2021-08-12 19:55:32,235 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:32,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:55:32,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:32,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:32,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:32,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538319136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:32,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:32,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:32,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675854877] [2021-08-12 19:55:32,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:32,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:32,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:32,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:32,312 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:33,828 INFO L93 Difference]: Finished difference Result 2181 states and 6845 transitions. [2021-08-12 19:55:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:55:33,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-12 19:55:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:33,832 INFO L225 Difference]: With dead ends: 2181 [2021-08-12 19:55:33,832 INFO L226 Difference]: Without dead ends: 2152 [2021-08-12 19:55:33,832 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:55:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-12 19:55:33,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-12 19:55:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-12 19:55:33,950 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-12 19:55:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:33,950 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-12 19:55:33,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-12 19:55:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:33,951 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:33,951 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:34,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 19:55:34,167 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-08-12 19:55:34,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:34,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953673868] [2021-08-12 19:55:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:34,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:34,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953673868] [2021-08-12 19:55:34,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953673868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:34,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849412867] [2021-08-12 19:55:34,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:34,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:55:34,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:34,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:34,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:34,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849412867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:34,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:34,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:55:34,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301722660] [2021-08-12 19:55:34,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:55:34,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:55:34,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:55:34,272 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-12 19:55:35,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:35,658 INFO L93 Difference]: Finished difference Result 2122 states and 6453 transitions. [2021-08-12 19:55:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:55:35,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-08-12 19:55:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:35,663 INFO L225 Difference]: With dead ends: 2122 [2021-08-12 19:55:35,663 INFO L226 Difference]: Without dead ends: 2097 [2021-08-12 19:55:35,663 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:55:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-12 19:55:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-12 19:55:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-12 19:55:35,801 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-12 19:55:35,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:35,802 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-12 19:55:35,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-12 19:55:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-12 19:55:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:35,803 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:35,803 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:36,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:36,019 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:36,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:36,020 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-08-12 19:55:36,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:36,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675514319] [2021-08-12 19:55:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:36,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:36,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675514319] [2021-08-12 19:55:36,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675514319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:36,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533751094] [2021-08-12 19:55:36,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:36,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:36,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533751094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:36,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:36,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:55:36,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002518726] [2021-08-12 19:55:36,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:55:36,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:36,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:55:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:55:36,129 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-12 19:55:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:37,483 INFO L93 Difference]: Finished difference Result 1988 states and 6105 transitions. [2021-08-12 19:55:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:55:37,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-08-12 19:55:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:37,488 INFO L225 Difference]: With dead ends: 1988 [2021-08-12 19:55:37,488 INFO L226 Difference]: Without dead ends: 1959 [2021-08-12 19:55:37,488 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:55:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-12 19:55:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-12 19:55:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-12 19:55:37,670 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-12 19:55:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:37,670 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-12 19:55:37,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-12 19:55:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-12 19:55:37,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:37,672 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:37,672 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:37,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-08-12 19:55:37,888 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:37,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-08-12 19:55:37,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:37,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632779921] [2021-08-12 19:55:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:37,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:37,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632779921] [2021-08-12 19:55:37,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632779921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:37,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510419713] [2021-08-12 19:55:37,914 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:37,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:55:37,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:37,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:37,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510419713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:37,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:37,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 19:55:37,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209444361] [2021-08-12 19:55:37,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:55:37,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:37,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:55:37,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:55:37,985 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-12 19:55:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:38,993 INFO L93 Difference]: Finished difference Result 1753 states and 5544 transitions. [2021-08-12 19:55:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:55:38,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-08-12 19:55:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:38,996 INFO L225 Difference]: With dead ends: 1753 [2021-08-12 19:55:38,996 INFO L226 Difference]: Without dead ends: 1716 [2021-08-12 19:55:38,997 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:55:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-12 19:55:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-12 19:55:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-12 19:55:39,125 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-12 19:55:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:39,125 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-12 19:55:39,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-12 19:55:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-12 19:55:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:39,126 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:39,127 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:39,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:39,343 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-08-12 19:55:39,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:39,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026222337] [2021-08-12 19:55:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:39,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:39,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026222337] [2021-08-12 19:55:39,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026222337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:39,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559990479] [2021-08-12 19:55:39,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:39,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:55:39,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:39,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:39,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559990479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:39,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:39,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:39,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721259894] [2021-08-12 19:55:39,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:39,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:39,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:39,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:39,481 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:40,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:40,954 INFO L93 Difference]: Finished difference Result 1846 states and 5777 transitions. [2021-08-12 19:55:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:55:40,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-12 19:55:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:40,958 INFO L225 Difference]: With dead ends: 1846 [2021-08-12 19:55:40,958 INFO L226 Difference]: Without dead ends: 1821 [2021-08-12 19:55:40,959 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:55:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-12 19:55:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-12 19:55:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-12 19:55:41,117 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-12 19:55:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:41,117 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-12 19:55:41,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:41,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-12 19:55:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:41,119 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:41,119 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:41,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-12 19:55:41,335 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:41,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-08-12 19:55:41,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:41,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841442706] [2021-08-12 19:55:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:41,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:41,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841442706] [2021-08-12 19:55:41,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841442706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:41,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057003338] [2021-08-12 19:55:41,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:41,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:55:41,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:41,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:41,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:41,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057003338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:41,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:41,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:55:41,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554270410] [2021-08-12 19:55:41,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:55:41,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:41,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:55:41,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:55:41,462 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:42,634 INFO L93 Difference]: Finished difference Result 1815 states and 5702 transitions. [2021-08-12 19:55:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:55:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-12 19:55:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:42,638 INFO L225 Difference]: With dead ends: 1815 [2021-08-12 19:55:42,638 INFO L226 Difference]: Without dead ends: 1786 [2021-08-12 19:55:42,639 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:55:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-12 19:55:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-12 19:55:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-12 19:55:42,799 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-12 19:55:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:42,799 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-12 19:55:42,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-12 19:55:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-12 19:55:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:55:42,801 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:42,801 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:43,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-12 19:55:43,018 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:43,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:43,018 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-08-12 19:55:43,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:43,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800425860] [2021-08-12 19:55:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:43,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:43,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800425860] [2021-08-12 19:55:43,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800425860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:43,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130847053] [2021-08-12 19:55:43,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:43,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:55:43,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:43,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:55:43,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:43,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130847053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:43,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:43,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:55:43,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398675494] [2021-08-12 19:55:43,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:55:43,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:43,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:55:43,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:55:43,118 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:44,163 INFO L93 Difference]: Finished difference Result 1674 states and 5382 transitions. [2021-08-12 19:55:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:55:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-08-12 19:55:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:44,168 INFO L225 Difference]: With dead ends: 1674 [2021-08-12 19:55:44,168 INFO L226 Difference]: Without dead ends: 1637 [2021-08-12 19:55:44,168 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:55:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-12 19:55:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-12 19:55:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-12 19:55:44,387 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-12 19:55:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:44,387 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-12 19:55:44,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-08-12 19:55:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-12 19:55:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:55:44,389 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:44,389 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:44,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:44,608 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-08-12 19:55:44,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:44,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284747982] [2021-08-12 19:55:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:45,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:45,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284747982] [2021-08-12 19:55:45,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284747982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:45,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647571320] [2021-08-12 19:55:45,198 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 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 [2021-08-12 19:55:45,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:55:45,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:45,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:55:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:45,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,623 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 31 treesize of output 19 [2021-08-12 19:55:45,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,628 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 [2021-08-12 19:55:45,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,634 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 21 treesize of output 13 [2021-08-12 19:55:45,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,639 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 36 treesize of output 19 [2021-08-12 19:55:45,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,644 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 21 treesize of output 13 [2021-08-12 19:55:45,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,649 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 33 treesize of output 19 [2021-08-12 19:55:45,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,655 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 [2021-08-12 19:55:45,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,663 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 33 treesize of output 19 [2021-08-12 19:55:45,665 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,669 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 26 treesize of output 13 [2021-08-12 19:55:45,670 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,675 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 [2021-08-12 19:55:45,676 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,680 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 33 treesize of output 19 [2021-08-12 19:55:45,681 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-08-12 19:55:45,685 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,690 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 26 treesize of output 13 [2021-08-12 19:55:45,692 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,696 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 33 treesize of output 19 [2021-08-12 19:55:45,697 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:45,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:45,700 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 31 treesize of output 19 [2021-08-12 19:55:45,700 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:45,773 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-08-12 19:55:45,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:55:45,775 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-08-12 19:55:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:45,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647571320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:45,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:45,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:55:45,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343813200] [2021-08-12 19:55:45,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:55:45,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:45,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:55:45,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:55:45,824 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:55:46,457 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-08-12 19:55:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:47,394 INFO L93 Difference]: Finished difference Result 1533 states and 5003 transitions. [2021-08-12 19:55:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:55:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:55:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:47,397 INFO L225 Difference]: With dead ends: 1533 [2021-08-12 19:55:47,397 INFO L226 Difference]: Without dead ends: 1516 [2021-08-12 19:55:47,398 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1258.5ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:55:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-08-12 19:55:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-08-12 19:55:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-08-12 19:55:47,566 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-08-12 19:55:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:47,567 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-08-12 19:55:47,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:55:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-08-12 19:55:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:55:47,568 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:47,568 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:47,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-12 19:55:47,785 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-08-12 19:55:47,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:47,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175576741] [2021-08-12 19:55:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:48,075 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-08-12 19:55:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:48,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:48,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175576741] [2021-08-12 19:55:48,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175576741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:48,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588585986] [2021-08-12 19:55:48,483 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 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 [2021-08-12 19:55:48,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:55:48,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:48,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:55:48,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:48,973 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-08-12 19:55:49,013 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-08-12 19:55:49,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:49,017 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 21 treesize of output 13 [2021-08-12 19:55:49,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:49,154 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-08-12 19:55:49,155 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-08-12 19:55:49,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:49,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:49,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:49,160 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 [2021-08-12 19:55:49,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:49,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:49,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:49,164 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 21 treesize of output 13 [2021-08-12 19:55:49,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:49,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:55:49,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:49,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:49,213 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 [2021-08-12 19:55:49,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:49,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:55:49,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:55:49,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-08-12 19:55:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:49,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588585986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:49,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:49,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:55:49,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207431623] [2021-08-12 19:55:49,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:55:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:55:49,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:55:49,320 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:55:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:50,895 INFO L93 Difference]: Finished difference Result 1511 states and 4947 transitions. [2021-08-12 19:55:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:55:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:55:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:50,899 INFO L225 Difference]: With dead ends: 1511 [2021-08-12 19:55:50,899 INFO L226 Difference]: Without dead ends: 1494 [2021-08-12 19:55:50,899 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1418.6ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:55:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-08-12 19:55:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1150. [2021-08-12 19:55:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-08-12 19:55:51,066 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-08-12 19:55:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:51,067 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-08-12 19:55:51,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:55:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-08-12 19:55:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:55:51,069 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:51,069 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:51,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:51,284 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:51,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-08-12 19:55:51,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:51,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482222468] [2021-08-12 19:55:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:51,729 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-08-12 19:55:51,930 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-08-12 19:55:52,047 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-08-12 19:55:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:52,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482222468] [2021-08-12 19:55:52,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482222468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495198169] [2021-08-12 19:55:52,119 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 19:55:52,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:55:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:55:52,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:52,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,852 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 35 treesize of output 19 [2021-08-12 19:55:52,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,859 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 28 treesize of output 13 [2021-08-12 19:55:52,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,868 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 30 treesize of output 16 [2021-08-12 19:55:52,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,877 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 35 treesize of output 19 [2021-08-12 19:55:52,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,886 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 39 treesize of output 16 [2021-08-12 19:55:52,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,894 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 32 treesize of output 16 [2021-08-12 19:55:52,894 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,901 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 34 treesize of output 16 [2021-08-12 19:55:52,901 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,908 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 37 treesize of output 19 [2021-08-12 19:55:52,909 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,916 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 33 treesize of output 13 [2021-08-12 19:55:52,917 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,923 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 28 treesize of output 13 [2021-08-12 19:55:52,924 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,931 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 39 treesize of output 19 [2021-08-12 19:55:52,932 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,939 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 41 treesize of output 16 [2021-08-12 19:55:52,939 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,946 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 39 treesize of output 13 [2021-08-12 19:55:52,947 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,954 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 30 treesize of output 16 [2021-08-12 19:55:52,954 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:52,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:55:52,959 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 41 treesize of output 13 [2021-08-12 19:55:52,960 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:52,985 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-08-12 19:55:52,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:55:52,987 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-08-12 19:55:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:53,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495198169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:53,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:53,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 19:55:53,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748240470] [2021-08-12 19:55:53,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:55:53,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:55:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:55:53,022 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 19:55:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:55:55,580 INFO L93 Difference]: Finished difference Result 1609 states and 5194 transitions. [2021-08-12 19:55:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:55:55,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-12 19:55:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:55:55,584 INFO L225 Difference]: With dead ends: 1609 [2021-08-12 19:55:55,584 INFO L226 Difference]: Without dead ends: 1592 [2021-08-12 19:55:55,585 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2191.0ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:55:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-08-12 19:55:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-08-12 19:55:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:55:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-08-12 19:55:55,779 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-08-12 19:55:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:55:55,779 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-08-12 19:55:55,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 19:55:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-08-12 19:55:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:55:55,781 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:55:55,781 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:55:55,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-12 19:55:55,997 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:55:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:55:55,997 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-08-12 19:55:55,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:55:55,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466872797] [2021-08-12 19:55:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:55:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:55:56,381 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-08-12 19:55:56,578 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-08-12 19:55:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:56,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:55:56,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466872797] [2021-08-12 19:55:56,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466872797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:56,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566033660] [2021-08-12 19:55:56,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:55:56,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:55:56,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:55:56,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:55:56,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:55:57,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:55:57,085 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 43 treesize of output 31 [2021-08-12 19:55:57,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,095 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:55:57,095 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 40 treesize of output 22 [2021-08-12 19:55:57,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:55:57,107 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 40 treesize of output 28 [2021-08-12 19:55:57,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,124 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:55:57,124 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 23 [2021-08-12 19:55:57,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,137 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:55:57,137 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 23 [2021-08-12 19:55:57,139 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:55:57,149 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 45 treesize of output 25 [2021-08-12 19:55:57,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:55:57,162 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 45 treesize of output 27 [2021-08-12 19:55:57,163 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,175 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:55:57,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-08-12 19:55:57,176 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,186 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:55:57,186 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 40 treesize of output 24 [2021-08-12 19:55:57,187 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,197 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:55:57,197 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 45 treesize of output 27 [2021-08-12 19:55:57,198 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,208 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:55:57,208 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 47 treesize of output 25 [2021-08-12 19:55:57,209 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:55:57,220 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 24 treesize of output 24 [2021-08-12 19:55:57,225 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:55:57,237 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 34 treesize of output 30 [2021-08-12 19:55:57,238 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:55:57,251 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 45 treesize of output 31 [2021-08-12 19:55:57,254 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,265 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:55:57,265 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 38 treesize of output 24 [2021-08-12 19:55:57,266 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:55:57,272 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:55:57,272 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 42 treesize of output 22 [2021-08-12 19:55:57,273 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:55:57,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:55:57,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:55:57,354 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-08-12 19:55:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:55:57,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566033660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:55:57,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:55:57,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 19:55:57,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510868122] [2021-08-12 19:55:57,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:55:57,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:55:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:55:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:55:57,556 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:55:58,286 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-08-12 19:55:58,569 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-08-12 19:55:59,104 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-08-12 19:55:59,265 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-08-12 19:55:59,528 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-08-12 19:55:59,778 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-08-12 19:56:00,046 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-08-12 19:56:00,211 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-08-12 19:56:00,964 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-08-12 19:56:01,408 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-08-12 19:56:01,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:56:01,925 INFO L93 Difference]: Finished difference Result 1845 states and 5869 transitions. [2021-08-12 19:56:01,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:56:01,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 19:56:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:56:01,929 INFO L225 Difference]: With dead ends: 1845 [2021-08-12 19:56:01,929 INFO L226 Difference]: Without dead ends: 1828 [2021-08-12 19:56:01,929 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3596.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:56:01,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-08-12 19:56:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-08-12 19:56:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:56:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-08-12 19:56:02,150 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-08-12 19:56:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:56:02,150 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-08-12 19:56:02,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:56:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-08-12 19:56:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:56:02,152 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:56:02,152 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:56:02,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:56:02,367 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:56:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:56:02,368 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-08-12 19:56:02,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:56:02,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678370341] [2021-08-12 19:56:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:56:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:02,767 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-08-12 19:56:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:02,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:56:02,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678370341] [2021-08-12 19:56:02,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678370341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:02,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668913819] [2021-08-12 19:56:02,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:56:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:02,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:56:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:56:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,485 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 33 treesize of output 13 [2021-08-12 19:56:03,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,493 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 30 treesize of output 16 [2021-08-12 19:56:03,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,500 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 37 treesize of output 19 [2021-08-12 19:56:03,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,509 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 28 treesize of output 13 [2021-08-12 19:56:03,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,516 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 41 treesize of output 13 [2021-08-12 19:56:03,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,523 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 39 treesize of output 19 [2021-08-12 19:56:03,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,532 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 39 treesize of output 16 [2021-08-12 19:56:03,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,540 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 35 treesize of output 19 [2021-08-12 19:56:03,541 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,547 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 41 treesize of output 16 [2021-08-12 19:56:03,548 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,554 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 32 treesize of output 16 [2021-08-12 19:56:03,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,561 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 30 treesize of output 16 [2021-08-12 19:56:03,562 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,568 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 28 treesize of output 13 [2021-08-12 19:56:03,568 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,574 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 39 treesize of output 13 [2021-08-12 19:56:03,575 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,581 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 34 treesize of output 16 [2021-08-12 19:56:03,582 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:03,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:03,586 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 35 treesize of output 19 [2021-08-12 19:56:03,586 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:03,608 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-08-12 19:56:03,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:56:03,609 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-08-12 19:56:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:03,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668913819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:03,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:56:03,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 19:56:03,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730119209] [2021-08-12 19:56:03,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:56:03,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:56:03,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:56:03,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:56:03,640 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 19:56:04,433 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2021-08-12 19:56:05,792 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-08-12 19:56:06,889 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-08-12 19:56:07,123 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-08-12 19:56:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:56:08,072 INFO L93 Difference]: Finished difference Result 1879 states and 5990 transitions. [2021-08-12 19:56:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:56:08,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-12 19:56:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:56:08,076 INFO L225 Difference]: With dead ends: 1879 [2021-08-12 19:56:08,076 INFO L226 Difference]: Without dead ends: 1862 [2021-08-12 19:56:08,077 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3285.7ms TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 19:56:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-08-12 19:56:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-08-12 19:56:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:56:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-08-12 19:56:08,280 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-08-12 19:56:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:56:08,280 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-08-12 19:56:08,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 19:56:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-08-12 19:56:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:56:08,282 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:56:08,282 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:56:08,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:56:08,498 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:56:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:56:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-08-12 19:56:08,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:56:08,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129538317] [2021-08-12 19:56:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:56:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:09,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:56:09,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129538317] [2021-08-12 19:56:09,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129538317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:09,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455447210] [2021-08-12 19:56:09,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:56:09,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:56:09,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:56:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:56:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:56:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,621 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 19:56:09,621 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 34 treesize of output 30 [2021-08-12 19:56:09,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,652 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-08-12 19:56:09,652 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 37 treesize of output 29 [2021-08-12 19:56:09,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,682 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-08-12 19:56:09,683 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 41 treesize of output 31 [2021-08-12 19:56:09,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,715 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-08-12 19:56:09,715 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 28 treesize of output 28 [2021-08-12 19:56:09,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,750 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-08-12 19:56:09,750 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 33 treesize of output 36 [2021-08-12 19:56:09,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,771 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 19:56:09,772 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 28 treesize of output 1 [2021-08-12 19:56:09,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,788 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 19:56:09,788 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 39 treesize of output 1 [2021-08-12 19:56:09,789 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,809 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-08-12 19:56:09,809 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 35 treesize of output 22 [2021-08-12 19:56:09,810 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,827 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 19:56:09,827 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 35 treesize of output 1 [2021-08-12 19:56:09,828 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,843 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 19:56:09,843 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 30 treesize of output 1 [2021-08-12 19:56:09,844 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,858 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 19:56:09,859 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 32 treesize of output 1 [2021-08-12 19:56:09,859 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,882 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-08-12 19:56:09,882 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 41 treesize of output 28 [2021-08-12 19:56:09,883 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:09,907 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 39 [2021-08-12 19:56:09,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,937 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 19:56:09,937 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 39 treesize of output 1 [2021-08-12 19:56:09,938 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,951 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 19:56:09,951 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 39 treesize of output 1 [2021-08-12 19:56:09,952 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:09,960 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 19:56:09,960 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 30 treesize of output 1 [2021-08-12 19:56:09,961 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:10,077 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-08-12 19:56:10,078 INFO L628 ElimStorePlain]: treesize reduction 94, result has 58.6 percent of original size [2021-08-12 19:56:10,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:56:10,083 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-08-12 19:56:10,217 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-08-12 19:56:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:10,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455447210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:10,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:56:10,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-12 19:56:10,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999686459] [2021-08-12 19:56:10,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:56:10,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:56:10,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:56:10,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:56:10,267 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 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) [2021-08-12 19:56:11,729 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-08-12 19:56:11,850 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-08-12 19:56:12,087 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2021-08-12 19:56:12,223 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-08-12 19:56:12,635 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-08-12 19:56:13,298 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-08-12 19:56:14,031 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-08-12 19:56:14,556 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-08-12 19:56:14,754 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-08-12 19:56:15,216 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-08-12 19:56:15,653 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-08-12 19:56:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:56:16,243 INFO L93 Difference]: Finished difference Result 2053 states and 6328 transitions. [2021-08-12 19:56:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 19:56:16,243 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 26 [2021-08-12 19:56:16,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:56:16,247 INFO L225 Difference]: With dead ends: 2053 [2021-08-12 19:56:16,247 INFO L226 Difference]: Without dead ends: 2006 [2021-08-12 19:56:16,248 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 4598.6ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-08-12 19:56:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-08-12 19:56:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1381. [2021-08-12 19:56:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:56:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-08-12 19:56:16,520 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-08-12 19:56:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:56:16,520 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-08-12 19:56:16,520 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) [2021-08-12 19:56:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-08-12 19:56:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:56:16,522 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:56:16,522 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:56:16,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-08-12 19:56:16,737 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:56:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:56:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-08-12 19:56:16,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:56:16,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635500012] [2021-08-12 19:56:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:56:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:16,942 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-08-12 19:56:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:17,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:56:17,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635500012] [2021-08-12 19:56:17,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635500012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:17,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822161553] [2021-08-12 19:56:17,258 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 [2021-08-12 19:56:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:17,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:56:17,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:56:17,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,747 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 33 treesize of output 19 [2021-08-12 19:56:17,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,753 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 [2021-08-12 19:56:17,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,758 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 31 treesize of output 19 [2021-08-12 19:56:17,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,779 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 [2021-08-12 19:56:17,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,784 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 26 treesize of output 13 [2021-08-12 19:56:17,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,790 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 21 treesize of output 13 [2021-08-12 19:56:17,791 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,796 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 33 treesize of output 19 [2021-08-12 19:56:17,796 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 19:56:17,802 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,820 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 33 treesize of output 19 [2021-08-12 19:56:17,821 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,826 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 26 treesize of output 13 [2021-08-12 19:56:17,826 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,832 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 [2021-08-12 19:56:17,832 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,837 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 36 treesize of output 19 [2021-08-12 19:56:17,838 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,843 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 33 treesize of output 19 [2021-08-12 19:56:17,844 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,864 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 [2021-08-12 19:56:17,864 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:17,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:17,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-08-12 19:56:17,868 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:17,952 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-08-12 19:56:17,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:56:17,954 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-08-12 19:56:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:18,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822161553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:18,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:56:18,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 19:56:18,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788132925] [2021-08-12 19:56:18,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:56:18,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:56:18,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:56:18,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:56:18,004 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:56:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:56:21,192 INFO L93 Difference]: Finished difference Result 1962 states and 6317 transitions. [2021-08-12 19:56:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:56:21,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 19:56:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:56:21,197 INFO L225 Difference]: With dead ends: 1962 [2021-08-12 19:56:21,197 INFO L226 Difference]: Without dead ends: 1945 [2021-08-12 19:56:21,198 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2021.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:56:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-08-12 19:56:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1425. [2021-08-12 19:56:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.3202247191011236) internal successors, (4728), 1424 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:56:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4728 transitions. [2021-08-12 19:56:21,483 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4728 transitions. Word has length 26 [2021-08-12 19:56:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:56:21,484 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4728 transitions. [2021-08-12 19:56:21,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:56:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4728 transitions. [2021-08-12 19:56:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:56:21,486 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:56:21,486 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:56:21,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:56:21,701 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:56:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:56:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-08-12 19:56:21,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:56:21,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633387514] [2021-08-12 19:56:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:56:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:21,931 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-08-12 19:56:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:22,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:56:22,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633387514] [2021-08-12 19:56:22,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633387514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:22,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458119080] [2021-08-12 19:56:22,303 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 [2021-08-12 19:56:22,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:56:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:56:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:56:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:56:22,676 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-08-12 19:56:22,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:22,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:22,745 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 43 treesize of output 41 [2021-08-12 19:56:22,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:22,882 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-08-12 19:56:22,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:22,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:22,906 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:56:22,906 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 33 [2021-08-12 19:56:22,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:23,043 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-08-12 19:56:23,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:23,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:23,066 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:56:23,067 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 34 treesize of output 36 [2021-08-12 19:56:23,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:23,202 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-08-12 19:56:23,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:23,227 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:56:23,227 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 40 treesize of output 34 [2021-08-12 19:56:23,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:23,358 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-08-12 19:56:23,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:23,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:23,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:23,376 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 24 treesize of output 34 [2021-08-12 19:56:23,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:23,503 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-08-12 19:56:23,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:23,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:23,519 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 45 treesize of output 41 [2021-08-12 19:56:23,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:23,644 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-08-12 19:56:23,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:23,664 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-08-12 19:56:23,664 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 38 treesize of output 30 [2021-08-12 19:56:23,666 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:23,790 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-08-12 19:56:23,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:23,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:23,808 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-08-12 19:56:23,809 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 29 [2021-08-12 19:56:23,810 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:23,928 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-08-12 19:56:23,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:23,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:56:23,948 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-08-12 19:56:24,182 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-08-12 19:56:24,365 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-08-12 19:56:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:24,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458119080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:24,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:56:24,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:56:24,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614248448] [2021-08-12 19:56:24,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:56:24,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:56:24,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:56:24,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:56:24,471 INFO L87 Difference]: Start difference. First operand 1425 states and 4728 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:56:25,526 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2021-08-12 19:56:25,916 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-08-12 19:56:26,285 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-08-12 19:56:26,625 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2021-08-12 19:56:26,995 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-08-12 19:56:27,548 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-08-12 19:56:28,102 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-08-12 19:56:28,249 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-08-12 19:56:28,729 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-08-12 19:56:29,051 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-08-12 19:56:29,469 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-08-12 19:56:30,010 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2021-08-12 19:56:30,600 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-08-12 19:56:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:56:31,264 INFO L93 Difference]: Finished difference Result 2028 states and 6476 transitions. [2021-08-12 19:56:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:56:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 19:56:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:56:31,269 INFO L225 Difference]: With dead ends: 2028 [2021-08-12 19:56:31,269 INFO L226 Difference]: Without dead ends: 2011 [2021-08-12 19:56:31,271 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 5843.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:56:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-08-12 19:56:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1444. [2021-08-12 19:56:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.324324324324324) internal successors, (4797), 1443 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:56:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4797 transitions. [2021-08-12 19:56:31,585 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4797 transitions. Word has length 26 [2021-08-12 19:56:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:56:31,585 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4797 transitions. [2021-08-12 19:56:31,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:56:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4797 transitions. [2021-08-12 19:56:31,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:56:31,587 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:56:31,587 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:56:31,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-08-12 19:56:31,801 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:56:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:56:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1506197498, now seen corresponding path program 9 times [2021-08-12 19:56:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:56:31,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411117167] [2021-08-12 19:56:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:56:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:32,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:56:32,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411117167] [2021-08-12 19:56:32,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411117167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:32,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19938005] [2021-08-12 19:56:32,303 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 [2021-08-12 19:56:32,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:56:32,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:56:32,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:56:32,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:56:32,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:32,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:32,985 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 21 treesize of output 13 [2021-08-12 19:56:32,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:32,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:32,993 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 26 treesize of output 13 [2021-08-12 19:56:32,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:33,123 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-08-12 19:56:33,124 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-08-12 19:56:33,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:33,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:33,129 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 [2021-08-12 19:56:33,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:33,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:33,134 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 21 treesize of output 13 [2021-08-12 19:56:33,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:33,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:33,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:33,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:33,183 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 [2021-08-12 19:56:33,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:33,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:33,224 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-08-12 19:56:33,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:56:33,227 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-08-12 19:56:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:33,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19938005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:33,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:56:33,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:56:33,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604664786] [2021-08-12 19:56:33,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:56:33,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:56:33,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:56:33,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:56:33,285 INFO L87 Difference]: Start difference. First operand 1444 states and 4797 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:56:34,227 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-08-12 19:56:34,426 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-08-12 19:56:34,842 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-08-12 19:56:35,225 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-08-12 19:56:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:56:36,496 INFO L93 Difference]: Finished difference Result 2029 states and 6514 transitions. [2021-08-12 19:56:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:56:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:56:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:56:36,501 INFO L225 Difference]: With dead ends: 2029 [2021-08-12 19:56:36,501 INFO L226 Difference]: Without dead ends: 2012 [2021-08-12 19:56:36,501 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2199.9ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:56:36,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-08-12 19:56:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1454. [2021-08-12 19:56:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.3269098417068137) internal successors, (4834), 1453 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:56:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4834 transitions. [2021-08-12 19:56:36,831 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4834 transitions. Word has length 26 [2021-08-12 19:56:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:56:36,831 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4834 transitions. [2021-08-12 19:56:36,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:56:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4834 transitions. [2021-08-12 19:56:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:56:36,834 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:56:36,834 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:56:37,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:56:37,036 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:56:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:56:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 10 times [2021-08-12 19:56:37,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:56:37,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853195025] [2021-08-12 19:56:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:56:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:37,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:56:37,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853195025] [2021-08-12 19:56:37,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853195025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:37,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619598694] [2021-08-12 19:56:37,532 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 [2021-08-12 19:56:37,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:56:37,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:56:37,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:56:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:56:37,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,804 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:56:37,804 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 35 treesize of output 19 [2021-08-12 19:56:37,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:37,816 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 42 treesize of output 27 [2021-08-12 19:56:37,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:56:37,832 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 28 treesize of output 17 [2021-08-12 19:56:37,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,844 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:56:37,844 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 35 treesize of output 19 [2021-08-12 19:56:37,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,855 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:56:37,856 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 35 treesize of output 19 [2021-08-12 19:56:37,856 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:37,870 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 33 treesize of output 24 [2021-08-12 19:56:37,871 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,882 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:56:37,882 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 30 treesize of output 16 [2021-08-12 19:56:37,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:37,897 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 23 treesize of output 18 [2021-08-12 19:56:37,900 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,913 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:56:37,914 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 35 treesize of output 19 [2021-08-12 19:56:37,914 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:37,930 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 37 treesize of output 24 [2021-08-12 19:56:37,934 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,945 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:56:37,945 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 30 treesize of output 16 [2021-08-12 19:56:37,946 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,959 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:56:37,959 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 40 treesize of output 22 [2021-08-12 19:56:37,959 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,974 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:56:37,974 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 28 treesize of output 17 [2021-08-12 19:56:37,976 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,988 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:56:37,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-08-12 19:56:37,988 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:37,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:37,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:38,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:38,002 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 42 treesize of output 27 [2021-08-12 19:56:38,003 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:38,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:38,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:38,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:38,013 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:56:38,013 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 37 treesize of output 20 [2021-08-12 19:56:38,014 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:38,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:38,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:56:38,089 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-08-12 19:56:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:38,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619598694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:38,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:56:38,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 19:56:38,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433020816] [2021-08-12 19:56:38,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:56:38,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:56:38,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:56:38,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:56:38,282 INFO L87 Difference]: Start difference. First operand 1454 states and 4834 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:56:40,439 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-08-12 19:56:40,859 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-08-12 19:56:41,168 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-08-12 19:56:41,569 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-08-12 19:56:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:56:43,089 INFO L93 Difference]: Finished difference Result 2387 states and 7604 transitions. [2021-08-12 19:56:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:56:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 19:56:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:56:43,094 INFO L225 Difference]: With dead ends: 2387 [2021-08-12 19:56:43,094 INFO L226 Difference]: Without dead ends: 2355 [2021-08-12 19:56:43,095 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3052.7ms TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 19:56:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-08-12 19:56:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1467. [2021-08-12 19:56:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.3342428376534787) internal successors, (4888), 1466 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:56:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4888 transitions. [2021-08-12 19:56:43,410 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4888 transitions. Word has length 26 [2021-08-12 19:56:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:56:43,411 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4888 transitions. [2021-08-12 19:56:43,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:56:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4888 transitions. [2021-08-12 19:56:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:56:43,413 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:56:43,413 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:56:43,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-08-12 19:56:43,629 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:56:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:56:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 11 times [2021-08-12 19:56:43,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:56:43,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211272853] [2021-08-12 19:56:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:56:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:44,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:56:44,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211272853] [2021-08-12 19:56:44,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211272853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:44,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294128989] [2021-08-12 19:56:44,138 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 [2021-08-12 19:56:44,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:56:44,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:56:44,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:56:44,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:56:44,545 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-08-12 19:56:44,743 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-08-12 19:56:44,799 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_37], 2=[v_prenex_39, v_prenex_38]} [2021-08-12 19:56:44,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:44,803 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 13 treesize of output 7 [2021-08-12 19:56:44,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:44,908 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-08-12 19:56:44,908 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.0 percent of original size [2021-08-12 19:56:44,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:44,912 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 21 treesize of output 13 [2021-08-12 19:56:44,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:44,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:44,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:44,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:44,960 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 [2021-08-12 19:56:44,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:45,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:45,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:45,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:45,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:45,006 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 21 treesize of output 13 [2021-08-12 19:56:45,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:45,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:45,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:45,010 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 [2021-08-12 19:56:45,011 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:45,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:45,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:56:45,045 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:205, output treesize:51 [2021-08-12 19:56:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:45,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294128989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:45,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:56:45,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:56:45,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649428246] [2021-08-12 19:56:45,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:56:45,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:56:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:56:45,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:56:45,141 INFO L87 Difference]: Start difference. First operand 1467 states and 4888 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:56:45,720 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-08-12 19:56:45,933 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-08-12 19:56:46,237 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-08-12 19:56:46,490 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-08-12 19:56:47,128 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-08-12 19:56:47,686 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-08-12 19:56:47,878 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-08-12 19:56:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:56:48,986 INFO L93 Difference]: Finished difference Result 1959 states and 6398 transitions. [2021-08-12 19:56:48,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:56:48,986 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 19:56:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:56:48,990 INFO L225 Difference]: With dead ends: 1959 [2021-08-12 19:56:48,990 INFO L226 Difference]: Without dead ends: 1942 [2021-08-12 19:56:48,990 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2933.4ms TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:56:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-08-12 19:56:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1470. [2021-08-12 19:56:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.3356024506466984) internal successors, (4900), 1469 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:56:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4900 transitions. [2021-08-12 19:56:49,308 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4900 transitions. Word has length 26 [2021-08-12 19:56:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:56:49,308 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4900 transitions. [2021-08-12 19:56:49,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:56:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4900 transitions. [2021-08-12 19:56:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:56:49,310 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:56:49,310 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:56:49,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-08-12 19:56:49,526 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:56:49,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:56:49,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1300110838, now seen corresponding path program 12 times [2021-08-12 19:56:49,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:56:49,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800377775] [2021-08-12 19:56:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:56:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:49,796 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-08-12 19:56:49,923 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-08-12 19:56:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:49,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:56:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800377775] [2021-08-12 19:56:49,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800377775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263872383] [2021-08-12 19:56:49,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:56:50,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:56:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:56:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:56:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:56:50,302 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-08-12 19:56:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:50,359 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:56:50,359 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 28 treesize of output 20 [2021-08-12 19:56:50,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:50,470 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-08-12 19:56:50,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:50,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:50,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:50,482 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 26 treesize of output 24 [2021-08-12 19:56:50,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:50,590 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-08-12 19:56:50,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:50,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:50,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:50,602 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 33 treesize of output 27 [2021-08-12 19:56:50,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:50,710 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-08-12 19:56:50,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:50,721 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:56:50,721 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 17 [2021-08-12 19:56:50,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:50,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:50,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:50,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:56:50,831 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 17 [2021-08-12 19:56:50,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:50,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:50,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:50,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:50,937 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 16 treesize of output 18 [2021-08-12 19:56:50,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:51,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:51,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:51,040 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 33 treesize of output 27 [2021-08-12 19:56:51,041 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:51,158 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-08-12 19:56:51,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:51,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:51,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:51,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-08-12 19:56:51,171 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:51,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:56:51,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:56:51,260 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-08-12 19:56:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:51,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263872383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:51,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:56:51,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:56:51,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651471332] [2021-08-12 19:56:51,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:56:51,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:56:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:56:51,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:56:51,421 INFO L87 Difference]: Start difference. First operand 1470 states and 4900 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:56:51,693 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-08-12 19:56:52,064 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2021-08-12 19:56:52,445 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-08-12 19:56:52,864 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-08-12 19:56:53,264 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-08-12 19:56:53,503 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-08-12 19:56:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:56:55,109 INFO L93 Difference]: Finished difference Result 2351 states and 7521 transitions. [2021-08-12 19:56:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:56:55,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:56:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:56:55,114 INFO L225 Difference]: With dead ends: 2351 [2021-08-12 19:56:55,114 INFO L226 Difference]: Without dead ends: 2319 [2021-08-12 19:56:55,114 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2222.8ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:56:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-08-12 19:56:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1476. [2021-08-12 19:56:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3403389830508474) internal successors, (4927), 1475 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:56:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4927 transitions. [2021-08-12 19:56:55,444 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4927 transitions. Word has length 26 [2021-08-12 19:56:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:56:55,445 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4927 transitions. [2021-08-12 19:56:55,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:56:55,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4927 transitions. [2021-08-12 19:56:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:56:55,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:56:55,447 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:56:55,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:56:55,661 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:56:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:56:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-08-12 19:56:55,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:56:55,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834165974] [2021-08-12 19:56:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:56:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:56:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:56,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:56:56,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834165974] [2021-08-12 19:56:56,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834165974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:56,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509811652] [2021-08-12 19:56:56,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:56:56,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:56:56,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:56:56,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:56:56,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:56:56,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,425 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 45 treesize of output 16 [2021-08-12 19:56:56,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,434 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 34 treesize of output 16 [2021-08-12 19:56:56,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,444 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 27 treesize of output 7 [2021-08-12 19:56:56,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,453 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 45 treesize of output 19 [2021-08-12 19:56:56,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,462 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 47 treesize of output 13 [2021-08-12 19:56:56,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,472 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 41 treesize of output 19 [2021-08-12 19:56:56,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,482 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 45 treesize of output 19 [2021-08-12 19:56:56,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,492 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 38 treesize of output 16 [2021-08-12 19:56:56,493 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,502 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 38 treesize of output 16 [2021-08-12 19:56:56,503 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,512 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 47 treesize of output 16 [2021-08-12 19:56:56,513 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,521 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 36 treesize of output 16 [2021-08-12 19:56:56,522 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,530 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 45 treesize of output 13 [2021-08-12 19:56:56,531 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,539 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 43 treesize of output 19 [2021-08-12 19:56:56,540 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,548 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 34 treesize of output 13 [2021-08-12 19:56:56,549 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-08-12 19:56:56,558 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:56:56,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:56:56,563 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 41 treesize of output 13 [2021-08-12 19:56:56,564 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:56:56,605 INFO L628 ElimStorePlain]: treesize reduction 48, result has 49.5 percent of original size [2021-08-12 19:56:56,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:56:56,606 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:921, output treesize:47 [2021-08-12 19:56:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:56:56,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509811652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:56:56,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:56:56,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-08-12 19:56:56,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772306497] [2021-08-12 19:56:56,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:56:56,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:56:56,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:56:56,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:56:56,681 INFO L87 Difference]: Start difference. First operand 1476 states and 4927 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-08-12 19:56:57,224 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-08-12 19:56:57,528 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-08-12 19:56:57,675 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-08-12 19:56:57,849 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-08-12 19:56:58,426 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-08-12 19:56:59,036 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-08-12 19:57:01,287 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-08-12 19:57:01,455 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-08-12 19:57:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:57:03,102 INFO L93 Difference]: Finished difference Result 3277 states and 10213 transitions. [2021-08-12 19:57:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:57:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 26 [2021-08-12 19:57:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:57:03,108 INFO L225 Difference]: With dead ends: 3277 [2021-08-12 19:57:03,108 INFO L226 Difference]: Without dead ends: 3109 [2021-08-12 19:57:03,109 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 3622.5ms TimeCoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2021-08-12 19:57:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-08-12 19:57:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1509. [2021-08-12 19:57:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.343501326259947) internal successors, (5042), 1508 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5042 transitions. [2021-08-12 19:57:03,472 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5042 transitions. Word has length 26 [2021-08-12 19:57:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:57:03,472 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5042 transitions. [2021-08-12 19:57:03,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-08-12 19:57:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5042 transitions. [2021-08-12 19:57:03,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:57:03,474 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:57:03,474 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:57:03,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-08-12 19:57:03,690 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:57:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:57:03,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-08-12 19:57:03,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:57:03,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458091256] [2021-08-12 19:57:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:57:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:57:03,972 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-08-12 19:57:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:04,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:57:04,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458091256] [2021-08-12 19:57:04,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458091256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:04,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120852061] [2021-08-12 19:57:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:57:04,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:57:04,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:57:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:57:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:57:04,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,807 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 34 treesize of output 16 [2021-08-12 19:57:04,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,814 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 43 treesize of output 13 [2021-08-12 19:57:04,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,823 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-08-12 19:57:04,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,830 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 25 treesize of output 7 [2021-08-12 19:57:04,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,838 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 39 treesize of output 19 [2021-08-12 19:57:04,839 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,846 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 43 treesize of output 13 [2021-08-12 19:57:04,846 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,854 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 37 treesize of output 13 [2021-08-12 19:57:04,855 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,863 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 43 treesize of output 19 [2021-08-12 19:57:04,863 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,871 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 32 treesize of output 16 [2021-08-12 19:57:04,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,879 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 45 treesize of output 16 [2021-08-12 19:57:04,880 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,887 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 36 treesize of output 16 [2021-08-12 19:57:04,888 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,895 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 41 treesize of output 19 [2021-08-12 19:57:04,896 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,903 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 32 treesize of output 13 [2021-08-12 19:57:04,904 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,912 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 41 treesize of output 16 [2021-08-12 19:57:04,912 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,919 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 30 treesize of output 13 [2021-08-12 19:57:04,920 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:04,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:04,924 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 34 treesize of output 16 [2021-08-12 19:57:04,925 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:04,959 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-08-12 19:57:04,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:57:04,960 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-08-12 19:57:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:04,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120852061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:04,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:57:04,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-12 19:57:04,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516319225] [2021-08-12 19:57:04,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:57:04,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:57:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:57:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:57:04,996 INFO L87 Difference]: Start difference. First operand 1509 states and 5042 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 19:57:05,512 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-08-12 19:57:05,832 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-08-12 19:57:05,975 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-08-12 19:57:06,463 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-08-12 19:57:07,016 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-08-12 19:57:07,447 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-08-12 19:57:08,904 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-08-12 19:57:09,054 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-08-12 19:57:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:57:10,538 INFO L93 Difference]: Finished difference Result 2967 states and 9392 transitions. [2021-08-12 19:57:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 19:57:10,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-12 19:57:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:57:10,544 INFO L225 Difference]: With dead ends: 2967 [2021-08-12 19:57:10,544 INFO L226 Difference]: Without dead ends: 2920 [2021-08-12 19:57:10,544 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3085.3ms TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:57:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-08-12 19:57:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1512. [2021-08-12 19:57:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.345466578424884) internal successors, (5055), 1511 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5055 transitions. [2021-08-12 19:57:10,914 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5055 transitions. Word has length 26 [2021-08-12 19:57:10,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:57:10,915 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5055 transitions. [2021-08-12 19:57:10,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 19:57:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5055 transitions. [2021-08-12 19:57:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:57:10,917 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:57:10,917 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:57:11,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-08-12 19:57:11,133 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:57:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:57:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-08-12 19:57:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:57:11,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140337141] [2021-08-12 19:57:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:57:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:57:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:11,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:57:11,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140337141] [2021-08-12 19:57:11,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140337141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:11,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150325685] [2021-08-12 19:57:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:57:11,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:57:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:57:11,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:57:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:57:12,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,104 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-08-12 19:57:12,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-08-12 19:57:12,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,129 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-08-12 19:57:12,129 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 37 treesize of output 37 [2021-08-12 19:57:12,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:12,154 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 45 [2021-08-12 19:57:12,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,181 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-08-12 19:57:12,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-08-12 19:57:12,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,202 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:57:12,202 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 45 treesize of output 1 [2021-08-12 19:57:12,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,224 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-08-12 19:57:12,224 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 32 treesize of output 25 [2021-08-12 19:57:12,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,248 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-08-12 19:57:12,248 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 37 treesize of output 25 [2021-08-12 19:57:12,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,265 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:57:12,265 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 43 treesize of output 1 [2021-08-12 19:57:12,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,280 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:57:12,280 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 34 treesize of output 1 [2021-08-12 19:57:12,281 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,296 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:57:12,296 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 41 treesize of output 1 [2021-08-12 19:57:12,296 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,311 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:57:12,311 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 34 treesize of output 1 [2021-08-12 19:57:12,311 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,332 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-08-12 19:57:12,333 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 30 treesize of output 25 [2021-08-12 19:57:12,334 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,349 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:57:12,349 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 43 treesize of output 1 [2021-08-12 19:57:12,349 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,363 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:57:12,363 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 43 treesize of output 1 [2021-08-12 19:57:12,364 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,397 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:57:12,398 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 39 treesize of output 1 [2021-08-12 19:57:12,398 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:12,407 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:57:12,407 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 41 treesize of output 1 [2021-08-12 19:57:12,408 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:12,526 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-08-12 19:57:12,526 INFO L628 ElimStorePlain]: treesize reduction 69, result has 64.2 percent of original size [2021-08-12 19:57:12,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:57:12,528 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-08-12 19:57:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:12,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150325685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:12,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:57:12,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-12 19:57:12,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134233689] [2021-08-12 19:57:12,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:57:12,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:57:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:57:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:57:12,645 INFO L87 Difference]: Start difference. First operand 1512 states and 5055 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 19:57:13,058 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-08-12 19:57:13,609 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-08-12 19:57:13,830 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-08-12 19:57:14,377 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-08-12 19:57:14,612 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-08-12 19:57:15,046 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-08-12 19:57:15,716 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-08-12 19:57:16,424 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-08-12 19:57:17,036 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-08-12 19:57:17,196 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-08-12 19:57:17,441 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-08-12 19:57:18,089 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2021-08-12 19:57:20,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:57:20,391 INFO L93 Difference]: Finished difference Result 3430 states and 10672 transitions. [2021-08-12 19:57:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:57:20,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-12 19:57:20,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:57:20,398 INFO L225 Difference]: With dead ends: 3430 [2021-08-12 19:57:20,398 INFO L226 Difference]: Without dead ends: 3368 [2021-08-12 19:57:20,398 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4370.2ms TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-08-12 19:57:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-08-12 19:57:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1525. [2021-08-12 19:57:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.356299212598425) internal successors, (5115), 1524 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5115 transitions. [2021-08-12 19:57:20,806 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5115 transitions. Word has length 26 [2021-08-12 19:57:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:57:20,806 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 5115 transitions. [2021-08-12 19:57:20,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 19:57:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5115 transitions. [2021-08-12 19:57:20,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:57:20,809 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:57:20,809 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:57:21,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-08-12 19:57:21,024 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:57:21,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:57:21,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-08-12 19:57:21,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:57:21,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833103974] [2021-08-12 19:57:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:57:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:57:21,314 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-08-12 19:57:21,480 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-08-12 19:57:21,643 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-08-12 19:57:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:21,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:57:21,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833103974] [2021-08-12 19:57:21,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833103974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:21,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678588010] [2021-08-12 19:57:21,761 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 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 [2021-08-12 19:57:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:57:21,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:57:21,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:57:22,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,121 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 [2021-08-12 19:57:22,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-08-12 19:57:22,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,131 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 [2021-08-12 19:57:22,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,136 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 33 treesize of output 19 [2021-08-12 19:57:22,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,141 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 21 treesize of output 13 [2021-08-12 19:57:22,142 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,146 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 33 treesize of output 19 [2021-08-12 19:57:22,147 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,151 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 31 treesize of output 19 [2021-08-12 19:57:22,151 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,156 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 [2021-08-12 19:57:22,156 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,161 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 21 treesize of output 13 [2021-08-12 19:57:22,161 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,166 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-08-12 19:57:22,166 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,171 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 26 treesize of output 13 [2021-08-12 19:57:22,171 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,175 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 [2021-08-12 19:57:22,176 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,180 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 31 treesize of output 19 [2021-08-12 19:57:22,181 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,185 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 33 treesize of output 19 [2021-08-12 19:57:22,185 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:22,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:22,188 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 36 treesize of output 19 [2021-08-12 19:57:22,189 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:22,260 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-08-12 19:57:22,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:57:22,262 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-08-12 19:57:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:22,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678588010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:22,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:57:22,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:57:22,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222677432] [2021-08-12 19:57:22,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:57:22,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:57:22,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:57:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:57:22,310 INFO L87 Difference]: Start difference. First operand 1525 states and 5115 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:57:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:57:24,726 INFO L93 Difference]: Finished difference Result 1910 states and 6276 transitions. [2021-08-12 19:57:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:57:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:57:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:57:24,730 INFO L225 Difference]: With dead ends: 1910 [2021-08-12 19:57:24,730 INFO L226 Difference]: Without dead ends: 1893 [2021-08-12 19:57:24,731 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1391.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:57:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-08-12 19:57:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1533. [2021-08-12 19:57:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.352480417754569) internal successors, (5136), 1532 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5136 transitions. [2021-08-12 19:57:25,154 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5136 transitions. Word has length 26 [2021-08-12 19:57:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:57:25,155 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5136 transitions. [2021-08-12 19:57:25,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:57:25,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5136 transitions. [2021-08-12 19:57:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:57:25,157 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:57:25,157 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:57:25,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-08-12 19:57:25,373 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:57:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:57:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-08-12 19:57:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:57:25,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091360971] [2021-08-12 19:57:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:57:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:57:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:25,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:57:25,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091360971] [2021-08-12 19:57:25,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091360971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:25,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579294440] [2021-08-12 19:57:25,992 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 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 [2021-08-12 19:57:26,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:57:26,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:57:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:57:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:57:26,350 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-08-12 19:57:26,439 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_60, v_prenex_62], 3=[A, v_prenex_54, v_prenex_64, v_prenex_58, v_prenex_56, v_prenex_66]} [2021-08-12 19:57:26,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:26,456 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 33 treesize of output 35 [2021-08-12 19:57:26,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:26,652 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-08-12 19:57:26,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:26,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:26,678 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 33 treesize of output 35 [2021-08-12 19:57:26,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:26,855 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-08-12 19:57:26,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:26,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:26,874 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:57:26,874 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 25 treesize of output 27 [2021-08-12 19:57:26,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:27,043 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-08-12 19:57:27,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:27,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:27,060 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:57:27,060 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 30 treesize of output 30 [2021-08-12 19:57:27,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:27,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:27,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:27,178 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-08-12 19:57:27,178 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 32 treesize of output 26 [2021-08-12 19:57:27,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:27,311 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-08-12 19:57:27,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:27,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:27,326 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 18 treesize of output 28 [2021-08-12 19:57:27,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:27,469 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-08-12 19:57:27,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:27,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:27,486 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-08-12 19:57:27,486 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 23 [2021-08-12 19:57:27,488 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:27,614 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-08-12 19:57:27,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:27,634 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:57:27,634 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 30 treesize of output 30 [2021-08-12 19:57:27,636 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:27,760 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-08-12 19:57:27,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:27,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:57:27,774 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:391, output treesize:457 [2021-08-12 19:57:28,068 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-08-12 19:57:28,293 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-08-12 19:57:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:28,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579294440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:28,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:57:28,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:57:28,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963277877] [2021-08-12 19:57:28,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:57:28,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:57:28,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:57:28,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:57:28,375 INFO L87 Difference]: Start difference. First operand 1533 states and 5136 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:57:28,608 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 21 [2021-08-12 19:57:29,345 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2021-08-12 19:57:29,811 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-08-12 19:57:30,435 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-08-12 19:57:30,626 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-08-12 19:57:31,167 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-08-12 19:57:31,757 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-08-12 19:57:32,321 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-08-12 19:57:32,552 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-08-12 19:57:33,349 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-08-12 19:57:33,578 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2021-08-12 19:57:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:57:34,603 INFO L93 Difference]: Finished difference Result 2213 states and 7086 transitions. [2021-08-12 19:57:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:57:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 19:57:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:57:34,608 INFO L225 Difference]: With dead ends: 2213 [2021-08-12 19:57:34,608 INFO L226 Difference]: Without dead ends: 2181 [2021-08-12 19:57:34,609 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 4816.9ms TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:57:34,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-08-12 19:57:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1518. [2021-08-12 19:57:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3513513513513513) internal successors, (5084), 1517 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5084 transitions. [2021-08-12 19:57:35,024 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5084 transitions. Word has length 26 [2021-08-12 19:57:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:57:35,024 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5084 transitions. [2021-08-12 19:57:35,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:57:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5084 transitions. [2021-08-12 19:57:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:57:35,027 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:57:35,027 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:57:35,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:57:35,241 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:57:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:57:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 15 times [2021-08-12 19:57:35,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:57:35,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308694365] [2021-08-12 19:57:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:57:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:57:35,451 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-08-12 19:57:35,723 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-08-12 19:57:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:35,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:57:35,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308694365] [2021-08-12 19:57:35,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308694365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:35,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563016946] [2021-08-12 19:57:35,908 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 [2021-08-12 19:57:35,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:57:35,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:57:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:57:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:57:36,237 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:57:36,238 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 26 treesize of output 16 [2021-08-12 19:57:36,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:36,254 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 33 treesize of output 35 [2021-08-12 19:57:36,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,274 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 19:57:36,274 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 24 [2021-08-12 19:57:36,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,294 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 19:57:36,294 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 21 treesize of output 21 [2021-08-12 19:57:36,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:36,312 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 16 treesize of output 26 [2021-08-12 19:57:36,318 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:36,335 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 33 treesize of output 35 [2021-08-12 19:57:36,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,347 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:57:36,347 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 33 treesize of output 19 [2021-08-12 19:57:36,348 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,358 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:57:36,358 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 36 treesize of output 22 [2021-08-12 19:57:36,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,370 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:57:36,370 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 33 treesize of output 19 [2021-08-12 19:57:36,371 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,380 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:57:36,381 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 16 [2021-08-12 19:57:36,381 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,402 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 19:57:36,403 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 21 treesize of output 25 [2021-08-12 19:57:36,406 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,427 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 19:57:36,427 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 28 [2021-08-12 19:57:36,432 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,442 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:57:36,442 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 31 treesize of output 19 [2021-08-12 19:57:36,443 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,452 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:57:36,452 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 16 [2021-08-12 19:57:36,453 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,462 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:57:36,463 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 31 treesize of output 19 [2021-08-12 19:57:36,463 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,480 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 19:57:36,480 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 26 treesize of output 28 [2021-08-12 19:57:36,482 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:36,589 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-08-12 19:57:36,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:36,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:57:36,604 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:430 [2021-08-12 19:57:36,836 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-08-12 19:57:37,036 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-08-12 19:57:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:37,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563016946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:37,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:57:37,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-12 19:57:37,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172647263] [2021-08-12 19:57:37,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:57:37,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:57:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:57:37,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:57:37,144 INFO L87 Difference]: Start difference. First operand 1518 states and 5084 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:57:38,165 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-08-12 19:57:38,309 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-08-12 19:57:38,567 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2021-08-12 19:57:38,816 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2021-08-12 19:57:38,976 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-08-12 19:57:39,279 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-08-12 19:57:39,766 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-08-12 19:57:40,328 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-08-12 19:57:40,599 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-08-12 19:57:41,204 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-08-12 19:57:41,366 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-08-12 19:57:41,979 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2021-08-12 19:57:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:57:42,783 INFO L93 Difference]: Finished difference Result 2209 states and 7078 transitions. [2021-08-12 19:57:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:57:42,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 19:57:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:57:42,787 INFO L225 Difference]: With dead ends: 2209 [2021-08-12 19:57:42,788 INFO L226 Difference]: Without dead ends: 2192 [2021-08-12 19:57:42,788 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3975.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:57:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-08-12 19:57:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1522. [2021-08-12 19:57:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.356344510190664) internal successors, (5105), 1521 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5105 transitions. [2021-08-12 19:57:43,202 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5105 transitions. Word has length 26 [2021-08-12 19:57:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:57:43,202 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5105 transitions. [2021-08-12 19:57:43,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:57:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5105 transitions. [2021-08-12 19:57:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:57:43,204 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:57:43,204 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:57:43,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:57:43,421 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:57:43,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:57:43,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 16 times [2021-08-12 19:57:43,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:57:43,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200218947] [2021-08-12 19:57:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:57:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:57:43,815 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-08-12 19:57:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:43,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:57:43,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200218947] [2021-08-12 19:57:43,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200218947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:43,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370312971] [2021-08-12 19:57:43,964 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 [2021-08-12 19:57:43,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:57:43,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:57:43,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:57:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:57:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:44,244 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 33 treesize of output 27 [2021-08-12 19:57:44,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:44,256 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 33 treesize of output 27 [2021-08-12 19:57:44,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:44,267 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 16 treesize of output 18 [2021-08-12 19:57:44,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:44,281 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 26 treesize of output 24 [2021-08-12 19:57:44,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,290 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:57:44,290 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 36 treesize of output 22 [2021-08-12 19:57:44,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,300 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:57:44,300 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 33 treesize of output 19 [2021-08-12 19:57:44,301 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,311 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:57:44,311 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 31 treesize of output 19 [2021-08-12 19:57:44,311 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:57:44,320 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 28 treesize of output 16 [2021-08-12 19:57:44,321 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:44,333 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 28 treesize of output 24 [2021-08-12 19:57:44,336 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,348 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:57:44,348 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 17 [2021-08-12 19:57:44,350 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,361 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:57:44,361 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 28 treesize of output 20 [2021-08-12 19:57:44,363 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,371 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:57:44,371 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 33 treesize of output 19 [2021-08-12 19:57:44,372 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,383 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:57:44,383 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 17 [2021-08-12 19:57:44,385 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,393 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:57:44,394 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 28 treesize of output 16 [2021-08-12 19:57:44,394 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,402 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:57:44,403 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 26 treesize of output 16 [2021-08-12 19:57:44,403 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:44,409 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:57:44,409 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 19 [2021-08-12 19:57:44,410 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:44,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:44,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:57:44,510 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-08-12 19:57:44,661 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-08-12 19:57:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:44,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370312971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:44,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:57:44,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 19:57:44,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604116019] [2021-08-12 19:57:44,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:57:44,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:57:44,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:57:44,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:57:44,754 INFO L87 Difference]: Start difference. First operand 1522 states and 5105 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:46,254 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-08-12 19:57:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:57:47,475 INFO L93 Difference]: Finished difference Result 2057 states and 6711 transitions. [2021-08-12 19:57:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:57:47,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:57:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:57:47,479 INFO L225 Difference]: With dead ends: 2057 [2021-08-12 19:57:47,479 INFO L226 Difference]: Without dead ends: 2040 [2021-08-12 19:57:47,480 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1314.2ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:57:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-08-12 19:57:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1529. [2021-08-12 19:57:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-08-12 19:57:47,897 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-08-12 19:57:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:57:47,897 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-08-12 19:57:47,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-08-12 19:57:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:57:47,900 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:57:47,900 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:57:48,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:57:48,113 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:57:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:57:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-08-12 19:57:48,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:57:48,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265296989] [2021-08-12 19:57:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:57:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:57:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:48,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:57:48,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265296989] [2021-08-12 19:57:48,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265296989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:48,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127533723] [2021-08-12 19:57:48,521 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 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 [2021-08-12 19:57:48,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:57:48,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:57:48,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:57:48,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:57:48,876 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-08-12 19:57:49,092 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-08-12 19:57:49,180 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_76], 2=[A, v_prenex_75]} [2021-08-12 19:57:49,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:49,184 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 21 treesize of output 13 [2021-08-12 19:57:49,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:49,281 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-08-12 19:57:49,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:49,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:49,285 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 [2021-08-12 19:57:49,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:49,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:49,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:49,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:49,332 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 [2021-08-12 19:57:49,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:49,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:49,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:57:49,336 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 21 treesize of output 13 [2021-08-12 19:57:49,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:49,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:49,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:57:49,372 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-08-12 19:57:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:49,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127533723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:49,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:57:49,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:57:49,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760715404] [2021-08-12 19:57:49,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:57:49,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:57:49,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:57:49,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:57:49,427 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:57:50,078 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-08-12 19:57:50,782 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-08-12 19:57:51,343 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-08-12 19:57:51,519 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-08-12 19:57:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:57:53,007 INFO L93 Difference]: Finished difference Result 2069 states and 6783 transitions. [2021-08-12 19:57:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:57:53,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 19:57:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:57:53,012 INFO L225 Difference]: With dead ends: 2069 [2021-08-12 19:57:53,012 INFO L226 Difference]: Without dead ends: 2052 [2021-08-12 19:57:53,012 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2167.9ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:57:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-08-12 19:57:53,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1532. [2021-08-12 19:57:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.357282821685173) internal successors, (5140), 1531 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:57:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5140 transitions. [2021-08-12 19:57:53,446 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5140 transitions. Word has length 26 [2021-08-12 19:57:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:57:53,446 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5140 transitions. [2021-08-12 19:57:53,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:57:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5140 transitions. [2021-08-12 19:57:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:57:53,448 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:57:53,448 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:57:53,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-08-12 19:57:53,664 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:57:53,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:57:53,664 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-08-12 19:57:53,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:57:53,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172837958] [2021-08-12 19:57:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:57:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:57:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:54,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:57:54,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172837958] [2021-08-12 19:57:54,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172837958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:54,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210135336] [2021-08-12 19:57:54,105 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 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 [2021-08-12 19:57:54,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:57:54,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:57:54,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:57:54,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:57:54,550 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-08-12 19:57:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:54,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:54,744 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 33 treesize of output 35 [2021-08-12 19:57:54,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:54,994 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 150 [2021-08-12 19:57:54,994 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-08-12 19:57:55,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:55,017 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 19:57:55,018 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-08-12 19:57:55,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:55,143 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-08-12 19:57:55,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:55,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:55,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:55,161 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 16 treesize of output 26 [2021-08-12 19:57:55,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:55,285 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-08-12 19:57:55,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:55,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:55,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:55,302 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 [2021-08-12 19:57:55,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:55,532 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-08-12 19:57:55,532 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-08-12 19:57:55,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:55,551 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 19:57:55,551 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 21 treesize of output 21 [2021-08-12 19:57:55,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:55,663 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-08-12 19:57:55,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:55,684 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 19:57:55,684 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 26 treesize of output 28 [2021-08-12 19:57:55,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:55,796 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-08-12 19:57:55,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:55,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:55,815 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 19:57:55,815 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 21 treesize of output 25 [2021-08-12 19:57:55,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:55,923 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-08-12 19:57:55,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:55,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:57:55,942 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 19:57:55,942 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 24 [2021-08-12 19:57:55,943 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:57:56,048 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-08-12 19:57:56,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:57:56,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:57:56,065 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:365, output treesize:256 [2021-08-12 19:57:56,246 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-08-12 19:57:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:57:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210135336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:57:56,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:57:56,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:57:56,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190028899] [2021-08-12 19:57:56,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:57:56,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:57:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:57:56,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:57:56,342 INFO L87 Difference]: Start difference. First operand 1532 states and 5140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:57:56,986 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-08-12 19:57:57,262 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-08-12 19:57:57,851 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 122 [2021-08-12 19:57:58,128 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-08-12 19:57:58,649 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-08-12 19:57:59,412 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2021-08-12 19:58:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:00,915 INFO L93 Difference]: Finished difference Result 2082 states and 6808 transitions. [2021-08-12 19:58:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:58:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:58:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:00,920 INFO L225 Difference]: With dead ends: 2082 [2021-08-12 19:58:00,920 INFO L226 Difference]: Without dead ends: 2065 [2021-08-12 19:58:00,920 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3171.3ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:58:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-08-12 19:58:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1529. [2021-08-12 19:58:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-08-12 19:58:01,376 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-08-12 19:58:01,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:01,376 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-08-12 19:58:01,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:58:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-08-12 19:58:01,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:01,378 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:01,378 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:01,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:58:01,593 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-08-12 19:58:01,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:01,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069001532] [2021-08-12 19:58:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:02,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:02,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069001532] [2021-08-12 19:58:02,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069001532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:02,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960711922] [2021-08-12 19:58:02,128 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 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 [2021-08-12 19:58:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:58:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:02,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,524 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 [2021-08-12 19:58:02,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,530 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 21 treesize of output 13 [2021-08-12 19:58:02,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,536 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 31 treesize of output 19 [2021-08-12 19:58:02,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,541 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 [2021-08-12 19:58:02,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,547 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 31 treesize of output 19 [2021-08-12 19:58:02,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,552 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 33 treesize of output 19 [2021-08-12 19:58:02,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,558 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 19:58:02,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,563 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 36 treesize of output 19 [2021-08-12 19:58:02,564 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,568 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 26 treesize of output 13 [2021-08-12 19:58:02,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,575 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 [2021-08-12 19:58:02,576 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,581 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 33 treesize of output 19 [2021-08-12 19:58:02,582 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,587 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 33 treesize of output 19 [2021-08-12 19:58:02,588 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-08-12 19:58:02,593 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,597 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 26 treesize of output 13 [2021-08-12 19:58:02,598 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:02,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:02,600 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 [2021-08-12 19:58:02,601 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:02,673 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-08-12 19:58:02,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:58:02,674 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-08-12 19:58:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:02,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960711922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:02,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:02,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:58:02,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976815820] [2021-08-12 19:58:02,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:58:02,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:02,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:58:02,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:58:02,723 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:58:05,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:05,257 INFO L93 Difference]: Finished difference Result 1988 states and 6509 transitions. [2021-08-12 19:58:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:58:05,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:58:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:05,262 INFO L225 Difference]: With dead ends: 1988 [2021-08-12 19:58:05,262 INFO L226 Difference]: Without dead ends: 1965 [2021-08-12 19:58:05,262 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1240.8ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:58:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-08-12 19:58:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1570. [2021-08-12 19:58:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3524537922243467) internal successors, (5260), 1569 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5260 transitions. [2021-08-12 19:58:05,721 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5260 transitions. Word has length 26 [2021-08-12 19:58:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:05,721 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5260 transitions. [2021-08-12 19:58:05,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:58:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5260 transitions. [2021-08-12 19:58:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:05,723 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:05,723 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:05,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-08-12 19:58:05,939 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-08-12 19:58:05,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:05,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132652810] [2021-08-12 19:58:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:06,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:06,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132652810] [2021-08-12 19:58:06,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132652810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:06,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533242603] [2021-08-12 19:58:06,356 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 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 [2021-08-12 19:58:06,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:58:06,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:58:06,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 19:58:06,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:06,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:06,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-08-12 19:58:06,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,697 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:58:06,697 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 16 [2021-08-12 19:58:06,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,706 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:58:06,706 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 33 treesize of output 19 [2021-08-12 19:58:06,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,724 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 19:58:06,724 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-08-12 19:58:06,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,746 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 19:58:06,746 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 28 [2021-08-12 19:58:06,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,772 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 19:58:06,772 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 26 treesize of output 28 [2021-08-12 19:58:06,774 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,784 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:58:06,785 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 36 treesize of output 22 [2021-08-12 19:58:06,785 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,795 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:58:06,796 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 31 treesize of output 19 [2021-08-12 19:58:06,796 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,816 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 19:58:06,817 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 21 treesize of output 25 [2021-08-12 19:58:06,820 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,836 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 19:58:06,837 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 21 treesize of output 21 [2021-08-12 19:58:06,838 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,848 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:58:06,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-08-12 19:58:06,848 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,857 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:58:06,857 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 26 treesize of output 16 [2021-08-12 19:58:06,858 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,867 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:58:06,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-08-12 19:58:06,868 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:06,883 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 33 treesize of output 35 [2021-08-12 19:58:06,885 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:06,900 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 33 treesize of output 35 [2021-08-12 19:58:06,901 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:06,908 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 19:58:06,908 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 16 [2021-08-12 19:58:06,909 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:07,011 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-08-12 19:58:07,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:07,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:58:07,024 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:407 [2021-08-12 19:58:07,240 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-08-12 19:58:07,450 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-08-12 19:58:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:07,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533242603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:07,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:07,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-12 19:58:07,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113146026] [2021-08-12 19:58:07,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:58:07,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:07,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:58:07,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:58:07,564 INFO L87 Difference]: Start difference. First operand 1570 states and 5260 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:58:08,615 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-08-12 19:58:08,799 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-08-12 19:58:09,247 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-08-12 19:58:10,895 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-08-12 19:58:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:11,828 INFO L93 Difference]: Finished difference Result 2170 states and 6950 transitions. [2021-08-12 19:58:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:58:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 19:58:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:11,833 INFO L225 Difference]: With dead ends: 2170 [2021-08-12 19:58:11,833 INFO L226 Difference]: Without dead ends: 2143 [2021-08-12 19:58:11,833 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2707.0ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:58:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-08-12 19:58:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1584. [2021-08-12 19:58:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.360707517372078) internal successors, (5320), 1583 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5320 transitions. [2021-08-12 19:58:12,310 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5320 transitions. Word has length 26 [2021-08-12 19:58:12,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:12,310 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5320 transitions. [2021-08-12 19:58:12,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:58:12,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5320 transitions. [2021-08-12 19:58:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:12,312 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:12,312 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:12,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-08-12 19:58:12,528 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:12,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-08-12 19:58:12,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:12,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614935292] [2021-08-12 19:58:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:12,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:12,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614935292] [2021-08-12 19:58:12,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614935292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:12,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661137671] [2021-08-12 19:58:12,929 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 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 [2021-08-12 19:58:12,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:58:12,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:58:12,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:58:12,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:13,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,254 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:13,254 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 19 [2021-08-12 19:58:13,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,264 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:13,264 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 17 [2021-08-12 19:58:13,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,273 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:13,273 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 28 treesize of output 16 [2021-08-12 19:58:13,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:13,283 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 26 treesize of output 24 [2021-08-12 19:58:13,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,295 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:13,295 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 28 treesize of output 20 [2021-08-12 19:58:13,296 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:13,307 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 33 treesize of output 27 [2021-08-12 19:58:13,310 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,319 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:13,319 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 36 treesize of output 22 [2021-08-12 19:58:13,320 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:13,331 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 33 treesize of output 19 [2021-08-12 19:58:13,332 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,341 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:13,341 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 28 treesize of output 16 [2021-08-12 19:58:13,341 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,351 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:13,351 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 31 treesize of output 19 [2021-08-12 19:58:13,352 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:13,363 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 16 treesize of output 18 [2021-08-12 19:58:13,366 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:13,378 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 33 treesize of output 27 [2021-08-12 19:58:13,379 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,391 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:13,391 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 17 [2021-08-12 19:58:13,392 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:13,403 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 28 treesize of output 24 [2021-08-12 19:58:13,408 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,417 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:13,418 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 33 treesize of output 19 [2021-08-12 19:58:13,418 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:13,424 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:13,424 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 26 treesize of output 16 [2021-08-12 19:58:13,425 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:13,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:13,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:58:13,516 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-08-12 19:58:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:13,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661137671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:13,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:13,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-12 19:58:13,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89277153] [2021-08-12 19:58:13,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:58:13,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:13,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:58:13,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:58:13,711 INFO L87 Difference]: Start difference. First operand 1584 states and 5320 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:58:14,563 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-08-12 19:58:15,216 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-08-12 19:58:15,719 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-08-12 19:58:16,341 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-08-12 19:58:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:17,514 INFO L93 Difference]: Finished difference Result 2092 states and 6849 transitions. [2021-08-12 19:58:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:58:17,515 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 19:58:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:17,519 INFO L225 Difference]: With dead ends: 2092 [2021-08-12 19:58:17,519 INFO L226 Difference]: Without dead ends: 2061 [2021-08-12 19:58:17,520 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2066.7ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:58:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-08-12 19:58:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1587. [2021-08-12 19:58:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.3612862547288778) internal successors, (5331), 1586 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5331 transitions. [2021-08-12 19:58:17,978 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5331 transitions. Word has length 26 [2021-08-12 19:58:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:17,978 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5331 transitions. [2021-08-12 19:58:17,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:58:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5331 transitions. [2021-08-12 19:58:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:17,980 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:17,980 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:18,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:58:18,196 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:18,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-08-12 19:58:18,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:18,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726138676] [2021-08-12 19:58:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:18,490 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-08-12 19:58:18,619 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-08-12 19:58:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:18,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726138676] [2021-08-12 19:58:18,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726138676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627977749] [2021-08-12 19:58:18,850 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 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 [2021-08-12 19:58:18,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:58:18,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:58:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:58:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:19,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:19,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:19,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:19,185 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 33 treesize of output 19 [2021-08-12 19:58:19,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:19,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:19,190 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 33 treesize of output 19 [2021-08-12 19:58:19,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:19,286 INFO L628 ElimStorePlain]: treesize reduction 121, result has 46.0 percent of original size [2021-08-12 19:58:19,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:19,290 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 21 treesize of output 13 [2021-08-12 19:58:19,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:19,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:19,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:19,330 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 21 treesize of output 13 [2021-08-12 19:58:19,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:19,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:19,366 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-08-12 19:58:19,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:58:19,368 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-08-12 19:58:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:19,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627977749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:19,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:19,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 19:58:19,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309396012] [2021-08-12 19:58:19,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:58:19,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:19,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:58:19,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:58:19,425 INFO L87 Difference]: Start difference. First operand 1587 states and 5331 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:21,130 INFO L93 Difference]: Finished difference Result 1664 states and 5524 transitions. [2021-08-12 19:58:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:58:21,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:58:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:21,135 INFO L225 Difference]: With dead ends: 1664 [2021-08-12 19:58:21,135 INFO L226 Difference]: Without dead ends: 1647 [2021-08-12 19:58:21,135 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 763.4ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:58:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-08-12 19:58:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1593. [2021-08-12 19:58:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.363065326633166) internal successors, (5354), 1592 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5354 transitions. [2021-08-12 19:58:21,623 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5354 transitions. Word has length 26 [2021-08-12 19:58:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:21,624 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5354 transitions. [2021-08-12 19:58:21,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5354 transitions. [2021-08-12 19:58:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:21,626 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:21,626 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:21,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:58:21,842 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:21,842 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-08-12 19:58:21,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:21,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131506322] [2021-08-12 19:58:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:22,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:22,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131506322] [2021-08-12 19:58:22,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131506322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:22,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143310656] [2021-08-12 19:58:22,194 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 [2021-08-12 19:58:22,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:58:22,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:58:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:58:22,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:22,574 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_115, v_prenex_117], 3=[A, v_prenex_119]} [2021-08-12 19:58:22,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:22,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:22,586 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 33 treesize of output 27 [2021-08-12 19:58:22,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:22,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:22,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:22,598 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 33 treesize of output 27 [2021-08-12 19:58:22,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:22,728 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-08-12 19:58:22,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:22,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:22,740 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:22,741 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 17 [2021-08-12 19:58:22,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:22,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:22,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:22,751 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 26 treesize of output 24 [2021-08-12 19:58:22,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:22,876 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-08-12 19:58:22,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:22,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:22,889 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-08-12 19:58:22,889 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 25 treesize of output 19 [2021-08-12 19:58:22,891 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:22,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:22,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:22,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:22,902 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 18 treesize of output 20 [2021-08-12 19:58:22,905 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:23,010 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-08-12 19:58:23,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:23,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:23,022 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 30 treesize of output 26 [2021-08-12 19:58:23,030 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:23,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:23,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:23,047 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-08-12 19:58:23,047 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 32 treesize of output 22 [2021-08-12 19:58:23,048 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:23,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:23,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:58:23,142 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:194 [2021-08-12 19:58:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143310656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:23,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:23,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:58:23,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347722867] [2021-08-12 19:58:23,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:58:23,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:23,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:58:23,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:58:23,318 INFO L87 Difference]: Start difference. First operand 1593 states and 5354 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:58:25,530 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-08-12 19:58:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:26,766 INFO L93 Difference]: Finished difference Result 2264 states and 7358 transitions. [2021-08-12 19:58:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:58:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 19:58:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:26,772 INFO L225 Difference]: With dead ends: 2264 [2021-08-12 19:58:26,772 INFO L226 Difference]: Without dead ends: 2212 [2021-08-12 19:58:26,772 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1455.4ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:58:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-08-12 19:58:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1600. [2021-08-12 19:58:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.367104440275172) internal successors, (5384), 1599 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5384 transitions. [2021-08-12 19:58:27,236 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5384 transitions. Word has length 26 [2021-08-12 19:58:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:27,236 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5384 transitions. [2021-08-12 19:58:27,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:58:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5384 transitions. [2021-08-12 19:58:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:27,238 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:27,238 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:27,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-08-12 19:58:27,453 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:27,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:27,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-08-12 19:58:27,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:27,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574457971] [2021-08-12 19:58:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:27,638 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-08-12 19:58:27,845 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-08-12 19:58:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:28,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:28,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574457971] [2021-08-12 19:58:28,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574457971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:28,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653645784] [2021-08-12 19:58:28,009 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 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 [2021-08-12 19:58:28,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:58:28,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:58:28,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:58:28,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:28,393 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-08-12 19:58:28,579 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-08-12 19:58:28,639 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_129], 2=[A, v_prenex_128]} [2021-08-12 19:58:28,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:28,643 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 21 treesize of output 13 [2021-08-12 19:58:28,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:28,743 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-08-12 19:58:28,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:28,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:28,747 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 [2021-08-12 19:58:28,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:28,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:28,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:28,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:28,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:28,792 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 21 treesize of output 13 [2021-08-12 19:58:28,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:28,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:28,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:28,796 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 [2021-08-12 19:58:28,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:28,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:28,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:58:28,832 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-08-12 19:58:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:28,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653645784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:28,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:28,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:58:28,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238031365] [2021-08-12 19:58:28,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:58:28,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:28,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:58:28,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:58:28,886 INFO L87 Difference]: Start difference. First operand 1600 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:58:29,986 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-08-12 19:58:30,586 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-08-12 19:58:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:31,921 INFO L93 Difference]: Finished difference Result 1993 states and 6589 transitions. [2021-08-12 19:58:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:58:31,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:58:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:31,925 INFO L225 Difference]: With dead ends: 1993 [2021-08-12 19:58:31,925 INFO L226 Difference]: Without dead ends: 1976 [2021-08-12 19:58:31,925 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1917.6ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:58:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-08-12 19:58:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1611. [2021-08-12 19:58:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.3670807453416147) internal successors, (5421), 1610 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5421 transitions. [2021-08-12 19:58:32,422 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5421 transitions. Word has length 26 [2021-08-12 19:58:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:32,422 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5421 transitions. [2021-08-12 19:58:32,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:58:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5421 transitions. [2021-08-12 19:58:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:32,424 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:32,424 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:32,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-08-12 19:58:32,641 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:32,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:32,641 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 25 times [2021-08-12 19:58:32,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:32,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917226130] [2021-08-12 19:58:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:32,869 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-08-12 19:58:32,999 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-08-12 19:58:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:33,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:33,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917226130] [2021-08-12 19:58:33,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917226130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:33,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70397184] [2021-08-12 19:58:33,198 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 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 [2021-08-12 19:58:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:33,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:58:33,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:33,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:33,438 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 35 treesize of output 19 [2021-08-12 19:58:33,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:33,450 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 42 treesize of output 27 [2021-08-12 19:58:33,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,464 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:33,464 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 28 treesize of output 17 [2021-08-12 19:58:33,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,475 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:33,476 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 35 treesize of output 19 [2021-08-12 19:58:33,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,486 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:33,487 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 35 treesize of output 19 [2021-08-12 19:58:33,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:33,502 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 33 treesize of output 24 [2021-08-12 19:58:33,503 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,514 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:33,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-08-12 19:58:33,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:33,528 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 23 treesize of output 18 [2021-08-12 19:58:33,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,544 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:33,544 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 35 treesize of output 19 [2021-08-12 19:58:33,545 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:33,559 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 37 treesize of output 24 [2021-08-12 19:58:33,562 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,574 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:33,574 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 30 treesize of output 16 [2021-08-12 19:58:33,575 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,586 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:33,586 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 40 treesize of output 22 [2021-08-12 19:58:33,587 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,601 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:33,601 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 28 treesize of output 17 [2021-08-12 19:58:33,602 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,613 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:33,613 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 30 treesize of output 16 [2021-08-12 19:58:33,614 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:33,627 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 42 treesize of output 27 [2021-08-12 19:58:33,628 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:33,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:33,637 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:33,637 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 37 treesize of output 20 [2021-08-12 19:58:33,638 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:33,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:33,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:58:33,709 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-08-12 19:58:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:33,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70397184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:33,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:33,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 19:58:33,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994665567] [2021-08-12 19:58:33,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:58:33,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:33,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:58:33,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:58:33,895 INFO L87 Difference]: Start difference. First operand 1611 states and 5421 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:58:34,508 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-08-12 19:58:34,688 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-08-12 19:58:35,953 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-08-12 19:58:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:37,588 INFO L93 Difference]: Finished difference Result 2104 states and 6932 transitions. [2021-08-12 19:58:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:58:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 19:58:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:37,593 INFO L225 Difference]: With dead ends: 2104 [2021-08-12 19:58:37,593 INFO L226 Difference]: Without dead ends: 2083 [2021-08-12 19:58:37,593 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1861.5ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:58:37,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-08-12 19:58:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1612. [2021-08-12 19:58:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 3.3699565487274983) internal successors, (5429), 1611 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5429 transitions. [2021-08-12 19:58:38,086 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5429 transitions. Word has length 26 [2021-08-12 19:58:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:38,086 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 5429 transitions. [2021-08-12 19:58:38,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:58:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5429 transitions. [2021-08-12 19:58:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:38,089 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:38,089 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:38,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:58:38,305 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 26 times [2021-08-12 19:58:38,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:38,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098177327] [2021-08-12 19:58:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:38,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:38,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098177327] [2021-08-12 19:58:38,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098177327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:38,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111736147] [2021-08-12 19:58:38,673 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 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 [2021-08-12 19:58:38,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:58:38,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:58:38,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:58:38,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:38,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:38,915 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:38,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-12 19:58:38,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:38,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:38,924 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:38,924 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 28 treesize of output 16 [2021-08-12 19:58:38,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:38,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:38,933 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:38,933 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 33 treesize of output 19 [2021-08-12 19:58:38,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:38,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:38,945 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:38,945 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 17 [2021-08-12 19:58:38,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:38,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:38,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:38,987 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 33 treesize of output 27 [2021-08-12 19:58:38,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,000 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:39,000 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 17 [2021-08-12 19:58:39,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,010 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:39,010 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 33 treesize of output 19 [2021-08-12 19:58:39,011 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:39,036 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 26 treesize of output 24 [2021-08-12 19:58:39,038 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:39,048 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 16 treesize of output 18 [2021-08-12 19:58:39,052 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,060 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:39,060 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 26 treesize of output 16 [2021-08-12 19:58:39,061 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,083 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:39,083 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 36 treesize of output 22 [2021-08-12 19:58:39,084 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:39,096 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 33 treesize of output 27 [2021-08-12 19:58:39,099 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,125 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:58:39,125 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 28 treesize of output 20 [2021-08-12 19:58:39,126 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:39,137 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 28 treesize of output 24 [2021-08-12 19:58:39,142 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,150 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:39,150 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 19 [2021-08-12 19:58:39,165 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:39,170 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 19:58:39,170 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 19 [2021-08-12 19:58:39,171 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:39,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:39,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:58:39,264 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-08-12 19:58:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:39,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111736147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:39,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:39,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 19:58:39,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045916665] [2021-08-12 19:58:39,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:58:39,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:58:39,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:58:39,503 INFO L87 Difference]: Start difference. First operand 1612 states and 5429 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:58:40,077 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-08-12 19:58:41,334 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-08-12 19:58:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:42,741 INFO L93 Difference]: Finished difference Result 2118 states and 6977 transitions. [2021-08-12 19:58:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:58:42,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 19:58:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:42,746 INFO L225 Difference]: With dead ends: 2118 [2021-08-12 19:58:42,746 INFO L226 Difference]: Without dead ends: 2091 [2021-08-12 19:58:42,746 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1482.7ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:58:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-08-12 19:58:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1618. [2021-08-12 19:58:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.368583797155226) internal successors, (5447), 1617 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5447 transitions. [2021-08-12 19:58:43,266 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5447 transitions. Word has length 26 [2021-08-12 19:58:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:43,266 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5447 transitions. [2021-08-12 19:58:43,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 19:58:43,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5447 transitions. [2021-08-12 19:58:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:43,268 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:43,268 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:43,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-08-12 19:58:43,482 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:43,482 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-08-12 19:58:43,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:43,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673110409] [2021-08-12 19:58:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:43,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:43,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673110409] [2021-08-12 19:58:43,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673110409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:43,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055509570] [2021-08-12 19:58:43,949 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 [2021-08-12 19:58:43,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:58:43,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:58:43,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:58:43,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:44,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,445 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 30 treesize of output 13 [2021-08-12 19:58:44,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,453 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 43 treesize of output 13 [2021-08-12 19:58:44,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,461 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 43 treesize of output 19 [2021-08-12 19:58:44,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,469 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 39 treesize of output 19 [2021-08-12 19:58:44,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,478 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 36 treesize of output 16 [2021-08-12 19:58:44,478 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,485 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 37 treesize of output 13 [2021-08-12 19:58:44,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,494 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 34 treesize of output 16 [2021-08-12 19:58:44,495 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,503 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 34 treesize of output 16 [2021-08-12 19:58:44,504 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,512 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 43 treesize of output 13 [2021-08-12 19:58:44,513 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,520 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 25 treesize of output 7 [2021-08-12 19:58:44,521 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,529 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 32 treesize of output 16 [2021-08-12 19:58:44,529 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,538 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 37 treesize of output 19 [2021-08-12 19:58:44,538 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,547 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 45 treesize of output 16 [2021-08-12 19:58:44,548 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,556 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 32 treesize of output 13 [2021-08-12 19:58:44,557 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,564 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 41 treesize of output 16 [2021-08-12 19:58:44,565 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:44,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:44,569 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 41 treesize of output 19 [2021-08-12 19:58:44,570 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:44,605 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-08-12 19:58:44,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:58:44,606 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-08-12 19:58:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:44,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055509570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:44,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:44,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 19:58:44,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998980436] [2021-08-12 19:58:44,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:58:44,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:44,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:58:44,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:58:44,635 INFO L87 Difference]: Start difference. First operand 1618 states and 5447 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 19:58:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:48,184 INFO L93 Difference]: Finished difference Result 2099 states and 6882 transitions. [2021-08-12 19:58:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:58:48,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-12 19:58:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:48,188 INFO L225 Difference]: With dead ends: 2099 [2021-08-12 19:58:48,188 INFO L226 Difference]: Without dead ends: 2071 [2021-08-12 19:58:48,196 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1752.8ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:58:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-08-12 19:58:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1622. [2021-08-12 19:58:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-08-12 19:58:48,700 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-08-12 19:58:48,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:48,700 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-08-12 19:58:48,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 19:58:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-08-12 19:58:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:48,702 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:48,702 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:48,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1205 [2021-08-12 19:58:48,918 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-08-12 19:58:48,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:48,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14808410] [2021-08-12 19:58:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:49,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:49,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14808410] [2021-08-12 19:58:49,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14808410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:49,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362396229] [2021-08-12 19:58:49,536 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 [2021-08-12 19:58:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:49,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:58:49,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:49,873 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_132, v_prenex_134], 6=[A, v_prenex_130]} [2021-08-12 19:58:49,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:49,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:49,879 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 32 treesize of output 16 [2021-08-12 19:58:49,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:49,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:49,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:49,884 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 25 treesize of output 13 [2021-08-12 19:58:49,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:49,987 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-08-12 19:58:49,987 INFO L628 ElimStorePlain]: treesize reduction 180, result has 40.2 percent of original size [2021-08-12 19:58:49,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:49,991 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 13 treesize of output 7 [2021-08-12 19:58:49,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:50,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:50,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:50,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:50,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:50,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:50,029 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 29 treesize of output 13 [2021-08-12 19:58:50,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:50,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:50,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:50,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-12 19:58:50,064 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:50,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:50,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 19:58:50,092 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:43 [2021-08-12 19:58:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:50,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362396229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:50,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:50,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 19:58:50,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065670720] [2021-08-12 19:58:50,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:58:50,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:58:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:58:50,138 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-12 19:58:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:58:54,340 INFO L93 Difference]: Finished difference Result 2272 states and 7449 transitions. [2021-08-12 19:58:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:58:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-12 19:58:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:58:54,345 INFO L225 Difference]: With dead ends: 2272 [2021-08-12 19:58:54,345 INFO L226 Difference]: Without dead ends: 2255 [2021-08-12 19:58:54,345 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2103.0ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 19:58:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-08-12 19:58:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1622. [2021-08-12 19:58:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:58:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-08-12 19:58:54,869 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-08-12 19:58:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:58:54,870 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-08-12 19:58:54,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-12 19:58:54,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-08-12 19:58:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:58:54,872 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:58:54,872 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:58:55,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:58:55,085 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:58:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:58:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 27 times [2021-08-12 19:58:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:58:55,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042456306] [2021-08-12 19:58:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:58:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:58:55,333 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-08-12 19:58:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:55,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:58:55,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042456306] [2021-08-12 19:58:55,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042456306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:55,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259833358] [2021-08-12 19:58:55,750 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 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 [2021-08-12 19:58:55,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:58:55,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:58:55,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:58:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:58:56,069 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-08-12 19:58:56,240 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-08-12 19:58:56,521 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-08-12 19:58:56,604 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_143, v_prenex_145], 6=[A, v_prenex_147]} [2021-08-12 19:58:56,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:56,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:56,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:56,611 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 33 treesize of output 19 [2021-08-12 19:58:56,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:56,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:56,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:56,617 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 [2021-08-12 19:58:56,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:56,772 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-08-12 19:58:56,773 INFO L628 ElimStorePlain]: treesize reduction 147, result has 51.5 percent of original size [2021-08-12 19:58:56,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:56,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:56,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:56,779 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 [2021-08-12 19:58:56,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:56,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:58:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:56,784 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 21 treesize of output 13 [2021-08-12 19:58:56,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:56,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:56,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:56,837 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 21 treesize of output 13 [2021-08-12 19:58:56,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:56,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:56,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:58:56,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:58:56,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:58:56,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:58:56,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:58:56,932 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:341, output treesize:61 [2021-08-12 19:58:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:58:56,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259833358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:58:56,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:58:56,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:58:56,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761565479] [2021-08-12 19:58:56,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:58:56,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:58:56,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:58:56,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:58:56,986 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:58:57,397 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-08-12 19:58:57,746 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-08-12 19:58:57,941 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-08-12 19:58:58,692 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 69 [2021-08-12 19:58:59,267 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-08-12 19:59:00,139 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 89 [2021-08-12 19:59:00,767 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 87 [2021-08-12 19:59:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:59:02,519 INFO L93 Difference]: Finished difference Result 2124 states and 6914 transitions. [2021-08-12 19:59:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:59:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:59:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:59:02,524 INFO L225 Difference]: With dead ends: 2124 [2021-08-12 19:59:02,524 INFO L226 Difference]: Without dead ends: 2107 [2021-08-12 19:59:02,524 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3884.2ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:59:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-08-12 19:59:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1633. [2021-08-12 19:59:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.3670343137254903) internal successors, (5495), 1632 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:59:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5495 transitions. [2021-08-12 19:59:03,069 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5495 transitions. Word has length 26 [2021-08-12 19:59:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:59:03,069 INFO L482 AbstractCegarLoop]: Abstraction has 1633 states and 5495 transitions. [2021-08-12 19:59:03,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:59:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5495 transitions. [2021-08-12 19:59:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:59:03,071 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:59:03,071 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:59:03,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-08-12 19:59:03,287 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:59:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:59:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-08-12 19:59:03,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:59:03,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040367257] [2021-08-12 19:59:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:59:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:59:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:03,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:59:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040367257] [2021-08-12 19:59:03,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040367257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635460301] [2021-08-12 19:59:03,824 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 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 [2021-08-12 19:59:03,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:59:03,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:59:03,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 19:59:03,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:59:04,214 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-08-12 19:59:04,533 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_158], 6=[v_prenex_160, v_prenex_162]} [2021-08-12 19:59:04,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:04,558 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:59:04,559 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 25 treesize of output 27 [2021-08-12 19:59:04,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:04,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:04,585 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:59:04,585 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 30 treesize of output 30 [2021-08-12 19:59:04,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:04,763 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-08-12 19:59:04,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:04,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:04,784 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-08-12 19:59:04,785 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 23 [2021-08-12 19:59:04,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:04,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:04,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:04,802 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 18 treesize of output 28 [2021-08-12 19:59:04,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:04,970 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-08-12 19:59:04,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:04,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:04,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:04,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:04,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:04,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:04,991 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 32 treesize of output 34 [2021-08-12 19:59:04,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:05,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:05,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:05,015 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-08-12 19:59:05,015 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 32 treesize of output 26 [2021-08-12 19:59:05,016 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:05,160 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-08-12 19:59:05,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:05,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:05,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:05,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:05,184 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:59:05,185 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 34 treesize of output 30 [2021-08-12 19:59:05,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:05,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:05,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:05,204 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-08-12 19:59:05,204 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 34 treesize of output 30 [2021-08-12 19:59:05,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:05,340 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-08-12 19:59:05,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:05,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:59:05,356 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:433, output treesize:343 [2021-08-12 19:59:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635460301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:05,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:59:05,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:59:05,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592363851] [2021-08-12 19:59:05,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:59:05,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:59:05,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:59:05,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:59:05,516 INFO L87 Difference]: Start difference. First operand 1633 states and 5495 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-08-12 19:59:07,975 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-08-12 19:59:08,108 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-08-12 19:59:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:59:11,048 INFO L93 Difference]: Finished difference Result 2552 states and 8116 transitions. [2021-08-12 19:59:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:59:11,048 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 26 [2021-08-12 19:59:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:59:11,053 INFO L225 Difference]: With dead ends: 2552 [2021-08-12 19:59:11,053 INFO L226 Difference]: Without dead ends: 2506 [2021-08-12 19:59:11,054 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 2951.7ms TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:59:11,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-08-12 19:59:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1640. [2021-08-12 19:59:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.36790726052471) internal successors, (5520), 1639 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:59:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5520 transitions. [2021-08-12 19:59:11,618 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5520 transitions. Word has length 26 [2021-08-12 19:59:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:59:11,618 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5520 transitions. [2021-08-12 19:59:11,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-08-12 19:59:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5520 transitions. [2021-08-12 19:59:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:59:11,620 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:59:11,620 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:59:11,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:59:11,836 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:59:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:59:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-08-12 19:59:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:59:11,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562112911] [2021-08-12 19:59:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:59:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:59:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:12,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:59:12,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562112911] [2021-08-12 19:59:12,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562112911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:12,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612066807] [2021-08-12 19:59:12,262 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 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 [2021-08-12 19:59:12,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:59:12,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:59:12,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:59:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:59:12,606 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-08-12 19:59:12,805 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-08-12 19:59:13,084 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-08-12 19:59:13,471 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 19:59:13,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-08-12 19:59:13,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:13,525 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-08-12 19:59:13,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 38 [2021-08-12 19:59:13,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:14,570 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 175 DAG size of output: 169 [2021-08-12 19:59:14,570 INFO L628 ElimStorePlain]: treesize reduction 23, result has 97.5 percent of original size [2021-08-12 19:59:14,641 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-12 19:59:14,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-08-12 19:59:14,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:14,697 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-08-12 19:59:14,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-08-12 19:59:14,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:15,204 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-08-12 19:59:15,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:15,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:15,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-08-12 19:59:15,281 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:15,334 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-08-12 19:59:15,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2021-08-12 19:59:15,341 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:16,884 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 185 DAG size of output: 168 [2021-08-12 19:59:16,884 INFO L628 ElimStorePlain]: treesize reduction 92, result has 90.6 percent of original size [2021-08-12 19:59:16,951 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 19:59:16,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2021-08-12 19:59:16,961 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:17,027 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-08-12 19:59:17,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 63 [2021-08-12 19:59:17,039 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:17,907 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 172 [2021-08-12 19:59:17,908 INFO L628 ElimStorePlain]: treesize reduction 83, result has 91.5 percent of original size [2021-08-12 19:59:17,957 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-08-12 19:59:17,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-08-12 19:59:17,964 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:17,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:17,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-08-12 19:59:18,024 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:18,390 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-08-12 19:59:18,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:18,443 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 19:59:18,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-08-12 19:59:18,450 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:18,491 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 19:59:18,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-08-12 19:59:18,505 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:19,235 WARN L205 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 152 [2021-08-12 19:59:19,235 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.8 percent of original size [2021-08-12 19:59:19,297 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-08-12 19:59:19,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-08-12 19:59:19,306 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:19,358 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-12 19:59:19,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 51 [2021-08-12 19:59:19,361 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:19,860 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-08-12 19:59:19,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:19,911 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-08-12 19:59:19,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-08-12 19:59:19,915 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:19,969 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 19:59:19,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-08-12 19:59:19,987 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:20,826 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2021-08-12 19:59:20,827 INFO L628 ElimStorePlain]: treesize reduction 68, result has 91.9 percent of original size [2021-08-12 19:59:20,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-08-12 19:59:20,929 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:913, output treesize:2294 [2021-08-12 19:59:21,594 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 69 [2021-08-12 19:59:21,766 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-08-12 19:59:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:21,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612066807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:21,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:59:21,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-12 19:59:21,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001138400] [2021-08-12 19:59:21,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:59:21,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:59:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:59:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:59:21,796 INFO L87 Difference]: Start difference. First operand 1640 states and 5520 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:59:24,406 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-08-12 19:59:24,889 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-08-12 19:59:25,792 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 89 [2021-08-12 19:59:26,190 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-08-12 19:59:26,554 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-08-12 19:59:26,726 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 33 [2021-08-12 19:59:27,791 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 90 [2021-08-12 19:59:28,292 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 92 [2021-08-12 19:59:29,834 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 96 [2021-08-12 19:59:30,217 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-08-12 19:59:31,141 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-08-12 19:59:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:59:32,862 INFO L93 Difference]: Finished difference Result 3088 states and 9770 transitions. [2021-08-12 19:59:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-12 19:59:32,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 26 [2021-08-12 19:59:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:59:32,868 INFO L225 Difference]: With dead ends: 3088 [2021-08-12 19:59:32,868 INFO L226 Difference]: Without dead ends: 3056 [2021-08-12 19:59:32,869 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 7703.5ms TimeCoverageRelationStatistics Valid=696, Invalid=4134, Unknown=0, NotChecked=0, Total=4830 [2021-08-12 19:59:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-08-12 19:59:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1671. [2021-08-12 19:59:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.3748502994011975) internal successors, (5636), 1670 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:59:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5636 transitions. [2021-08-12 19:59:33,483 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5636 transitions. Word has length 26 [2021-08-12 19:59:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:59:33,483 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5636 transitions. [2021-08-12 19:59:33,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:59:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5636 transitions. [2021-08-12 19:59:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:59:33,485 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:59:33,485 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:59:33,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:59:33,689 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:59:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:59:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 28 times [2021-08-12 19:59:33,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:59:33,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426487960] [2021-08-12 19:59:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:59:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:59:33,874 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-08-12 19:59:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:34,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:59:34,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426487960] [2021-08-12 19:59:34,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426487960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:34,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601075596] [2021-08-12 19:59:34,266 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 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 [2021-08-12 19:59:34,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:59:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:59:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:59:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:59:34,607 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-08-12 19:59:34,849 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-08-12 19:59:34,914 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_185], 2=[v_prenex_186, v_prenex_187], 3=[A]} [2021-08-12 19:59:34,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:34,918 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 21 treesize of output 13 [2021-08-12 19:59:34,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:35,037 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-08-12 19:59:35,038 INFO L628 ElimStorePlain]: treesize reduction 94, result has 60.3 percent of original size [2021-08-12 19:59:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:35,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:35,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:35,043 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 [2021-08-12 19:59:35,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:35,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:35,047 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 21 treesize of output 13 [2021-08-12 19:59:35,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:35,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:35,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:35,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:35,094 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 [2021-08-12 19:59:35,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:35,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:35,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:35,136 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 11 treesize of output 7 [2021-08-12 19:59:35,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:35,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:35,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:59:35,175 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:251, output treesize:56 [2021-08-12 19:59:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:35,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601075596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:35,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:59:35,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:59:35,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950322859] [2021-08-12 19:59:35,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:59:35,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:59:35,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:59:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:59:35,229 INFO L87 Difference]: Start difference. First operand 1671 states and 5636 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:59:35,837 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-08-12 19:59:36,987 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-08-12 19:59:37,118 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-08-12 19:59:37,634 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-08-12 19:59:37,886 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-08-12 19:59:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:59:39,838 INFO L93 Difference]: Finished difference Result 2246 states and 7298 transitions. [2021-08-12 19:59:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:59:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 19:59:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:59:39,843 INFO L225 Difference]: With dead ends: 2246 [2021-08-12 19:59:39,843 INFO L226 Difference]: Without dead ends: 2229 [2021-08-12 19:59:39,843 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2596.7ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:59:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-08-12 19:59:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1676. [2021-08-12 19:59:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.3761194029850747) internal successors, (5655), 1675 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:59:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5655 transitions. [2021-08-12 19:59:40,404 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5655 transitions. Word has length 26 [2021-08-12 19:59:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:59:40,404 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5655 transitions. [2021-08-12 19:59:40,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 19:59:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5655 transitions. [2021-08-12 19:59:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:59:40,407 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:59:40,407 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:59:40,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:59:40,613 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:59:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:59:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash 318878074, now seen corresponding path program 29 times [2021-08-12 19:59:40,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:59:40,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327676918] [2021-08-12 19:59:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:59:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:59:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:40,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:59:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327676918] [2021-08-12 19:59:40,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327676918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123448873] [2021-08-12 19:59:40,963 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 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 [2021-08-12 19:59:40,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:59:40,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:59:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:59:40,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:59:41,347 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-08-12 19:59:41,547 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-08-12 19:59:41,594 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_195, v_prenex_197, v_prenex_199, v_prenex_200, v_prenex_201], 3=[v_prenex_196, v_prenex_198]} [2021-08-12 19:59:41,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:41,606 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:59:41,606 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 28 treesize of output 20 [2021-08-12 19:59:41,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:41,719 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-08-12 19:59:41,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:41,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:41,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:41,731 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 33 treesize of output 27 [2021-08-12 19:59:41,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:41,872 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-08-12 19:59:41,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:41,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:41,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:41,883 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 26 treesize of output 24 [2021-08-12 19:59:41,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:41,997 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-08-12 19:59:41,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:42,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:42,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:42,008 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 28 treesize of output 24 [2021-08-12 19:59:42,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:42,115 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-08-12 19:59:42,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:42,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:42,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:42,127 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 33 treesize of output 27 [2021-08-12 19:59:42,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:42,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:42,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:42,235 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 19:59:42,236 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 21 treesize of output 17 [2021-08-12 19:59:42,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:42,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:42,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:42,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:42,343 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-08-12 19:59:42,343 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 19 [2021-08-12 19:59:42,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:42,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:42,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:42,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:42,446 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 18 treesize of output 20 [2021-08-12 19:59:42,449 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:42,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:59:42,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:59:42,541 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-08-12 19:59:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:42,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123448873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:42,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:59:42,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:59:42,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715523775] [2021-08-12 19:59:42,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:59:42,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:59:42,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:59:42,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:59:42,718 INFO L87 Difference]: Start difference. First operand 1676 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:59:43,030 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-08-12 19:59:44,118 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-08-12 19:59:44,974 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2021-08-12 19:59:45,363 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-08-12 19:59:45,762 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-08-12 19:59:46,572 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 110 [2021-08-12 19:59:47,065 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-08-12 19:59:47,322 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-08-12 19:59:48,190 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-08-12 19:59:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:59:50,224 INFO L93 Difference]: Finished difference Result 2688 states and 8640 transitions. [2021-08-12 19:59:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 19:59:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 19:59:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:59:50,230 INFO L225 Difference]: With dead ends: 2688 [2021-08-12 19:59:50,230 INFO L226 Difference]: Without dead ends: 2652 [2021-08-12 19:59:50,230 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 4316.2ms TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:59:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-08-12 19:59:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1683. [2021-08-12 19:59:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.381688466111772) internal successors, (5688), 1682 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:59:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5688 transitions. [2021-08-12 19:59:50,851 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5688 transitions. Word has length 26 [2021-08-12 19:59:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:59:50,851 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5688 transitions. [2021-08-12 19:59:50,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 19:59:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5688 transitions. [2021-08-12 19:59:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:59:50,853 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:59:50,854 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:59:51,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-08-12 19:59:51,069 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:59:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:59:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-08-12 19:59:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:59:51,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746365726] [2021-08-12 19:59:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:59:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:59:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:51,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:59:51,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746365726] [2021-08-12 19:59:51,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746365726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:51,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832782509] [2021-08-12 19:59:51,484 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 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 [2021-08-12 19:59:51,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:59:51,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:59:51,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:59:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:59:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,079 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 36 treesize of output 16 [2021-08-12 19:59:52,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,087 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 30 treesize of output 16 [2021-08-12 19:59:52,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,095 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 37 treesize of output 19 [2021-08-12 19:59:52,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,103 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 43 treesize of output 16 [2021-08-12 19:59:52,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,111 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 43 treesize of output 16 [2021-08-12 19:59:52,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,119 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 37 treesize of output 19 [2021-08-12 19:59:52,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,128 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 39 treesize of output 19 [2021-08-12 19:59:52,129 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,136 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 41 treesize of output 19 [2021-08-12 19:59:52,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,145 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 32 treesize of output 16 [2021-08-12 19:59:52,146 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,154 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 25 treesize of output 13 [2021-08-12 19:59:52,155 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,163 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 34 treesize of output 16 [2021-08-12 19:59:52,164 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,172 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 34 treesize of output 16 [2021-08-12 19:59:52,173 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,183 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 45 treesize of output 19 [2021-08-12 19:59:52,184 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,194 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 43 treesize of output 19 [2021-08-12 19:59:52,195 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,204 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 41 treesize of output 19 [2021-08-12 19:59:52,205 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:59:52,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:59:52,210 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 32 treesize of output 16 [2021-08-12 19:59:52,211 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:59:52,271 INFO L628 ElimStorePlain]: treesize reduction 237, result has 13.5 percent of original size [2021-08-12 19:59:52,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:59:52,272 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-08-12 19:59:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:59:52,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832782509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:59:52,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:59:52,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-12 19:59:52,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139742641] [2021-08-12 19:59:52,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:59:52,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:59:52,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:59:52,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:59:52,307 INFO L87 Difference]: Start difference. First operand 1683 states and 5688 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 19:59:53,743 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-08-12 19:59:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:59:59,046 INFO L93 Difference]: Finished difference Result 3386 states and 10828 transitions. [2021-08-12 19:59:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 19:59:59,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-12 19:59:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:59:59,052 INFO L225 Difference]: With dead ends: 3386 [2021-08-12 19:59:59,052 INFO L226 Difference]: Without dead ends: 3348 [2021-08-12 19:59:59,053 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2615.8ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:59:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-08-12 19:59:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 1796. [2021-08-12 19:59:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 3.403899721448468) internal successors, (6110), 1795 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:59:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6110 transitions. [2021-08-12 19:59:59,697 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6110 transitions. Word has length 26 [2021-08-12 19:59:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:59:59,697 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 6110 transitions. [2021-08-12 19:59:59,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 19:59:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6110 transitions. [2021-08-12 19:59:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:59:59,699 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:59:59,699 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:59:59,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:59:59,915 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:59:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:59:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-08-12 19:59:59,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:59:59,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259896563] [2021-08-12 19:59:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:59:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:00,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:00,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259896563] [2021-08-12 20:00:00,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259896563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:00,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818122368] [2021-08-12 20:00:00,384 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 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 [2021-08-12 20:00:00,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:00:00,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:00,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:00:00,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:00,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,881 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-08-12 20:00:00,881 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 45 treesize of output 37 [2021-08-12 20:00:00,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,916 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-08-12 20:00:00,917 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 37 treesize of output 47 [2021-08-12 20:00:00,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,946 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-08-12 20:00:00,946 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 30 treesize of output 34 [2021-08-12 20:00:00,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:00,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,974 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-08-12 20:00:00,974 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 32 treesize of output 30 [2021-08-12 20:00:00,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,001 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-08-12 20:00:01,001 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 41 treesize of output 28 [2021-08-12 20:00:01,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,021 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:00:01,021 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 34 treesize of output 1 [2021-08-12 20:00:01,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,045 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-08-12 20:00:01,046 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 43 treesize of output 28 [2021-08-12 20:00:01,047 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,063 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:00:01,064 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 39 treesize of output 1 [2021-08-12 20:00:01,064 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,080 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:00:01,081 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 41 treesize of output 1 [2021-08-12 20:00:01,081 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,099 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:00:01,099 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 37 treesize of output 1 [2021-08-12 20:00:01,100 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,124 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-08-12 20:00:01,124 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 32 treesize of output 25 [2021-08-12 20:00:01,125 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,140 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:00:01,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-08-12 20:00:01,143 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,157 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:00:01,157 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 34 treesize of output 1 [2021-08-12 20:00:01,157 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,171 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:00:01,172 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 43 treesize of output 1 [2021-08-12 20:00:01,172 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:01,204 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 45 [2021-08-12 20:00:01,209 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:01,218 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:00:01,218 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 43 treesize of output 1 [2021-08-12 20:00:01,219 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:01,386 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-08-12 20:00:01,386 INFO L628 ElimStorePlain]: treesize reduction 116, result has 51.7 percent of original size [2021-08-12 20:00:01,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:00:01,389 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-08-12 20:00:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:01,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818122368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:01,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:01,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-12 20:00:01,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137478734] [2021-08-12 20:00:01,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:00:01,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:01,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:00:01,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:00:01,536 INFO L87 Difference]: Start difference. First operand 1796 states and 6110 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 20:00:03,105 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-08-12 20:00:03,427 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-08-12 20:00:03,926 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-08-12 20:00:04,142 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-08-12 20:00:04,515 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-08-12 20:00:04,870 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-08-12 20:00:05,699 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-08-12 20:00:06,887 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-08-12 20:00:07,199 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-08-12 20:00:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:11,469 INFO L93 Difference]: Finished difference Result 3834 states and 12121 transitions. [2021-08-12 20:00:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 20:00:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-12 20:00:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:11,478 INFO L225 Difference]: With dead ends: 3834 [2021-08-12 20:00:11,478 INFO L226 Difference]: Without dead ends: 3775 [2021-08-12 20:00:11,479 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3681.5ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-08-12 20:00:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-08-12 20:00:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 1819. [2021-08-12 20:00:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.407590759075908) internal successors, (6195), 1818 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:12,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6195 transitions. [2021-08-12 20:00:12,347 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6195 transitions. Word has length 26 [2021-08-12 20:00:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:12,348 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 6195 transitions. [2021-08-12 20:00:12,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 20:00:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6195 transitions. [2021-08-12 20:00:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:00:12,350 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:12,351 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:12,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-08-12 20:00:12,558 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:12,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:12,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 30 times [2021-08-12 20:00:12,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:12,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540131123] [2021-08-12 20:00:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:13,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:13,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540131123] [2021-08-12 20:00:13,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540131123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:13,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212153477] [2021-08-12 20:00:13,161 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 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 [2021-08-12 20:00:13,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:00:13,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:00:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:13,726 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-08-12 20:00:14,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:14,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:14,268 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 33 treesize of output 35 [2021-08-12 20:00:14,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:14,428 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-08-12 20:00:14,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:14,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:14,450 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:00:14,450 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 24 [2021-08-12 20:00:14,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:14,572 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-08-12 20:00:14,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:14,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:14,595 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:00:14,595 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 21 treesize of output 25 [2021-08-12 20:00:14,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:14,714 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-08-12 20:00:14,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:14,772 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:00:14,772 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 28 [2021-08-12 20:00:14,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:14,922 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-08-12 20:00:14,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:14,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:14,941 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:00:14,941 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 26 treesize of output 28 [2021-08-12 20:00:14,943 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:15,049 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-08-12 20:00:15,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:15,088 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:00:15,089 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 21 treesize of output 21 [2021-08-12 20:00:15,090 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:15,191 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-08-12 20:00:15,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:15,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:15,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:15,206 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 33 treesize of output 35 [2021-08-12 20:00:15,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:15,311 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-08-12 20:00:15,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:15,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:15,326 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 16 treesize of output 26 [2021-08-12 20:00:15,329 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:15,431 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-08-12 20:00:15,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:15,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:00:15,450 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:373, output treesize:497 [2021-08-12 20:00:15,698 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-08-12 20:00:15,894 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-08-12 20:00:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:15,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212153477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:15,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:15,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:00:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369461028] [2021-08-12 20:00:15,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:00:15,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:00:15,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:00:15,984 INFO L87 Difference]: Start difference. First operand 1819 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 20:00:16,852 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-08-12 20:00:17,033 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-08-12 20:00:17,429 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-08-12 20:00:17,743 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-08-12 20:00:18,347 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-08-12 20:00:18,863 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-08-12 20:00:19,261 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-08-12 20:00:19,585 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-08-12 20:00:20,194 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2021-08-12 20:00:20,547 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-08-12 20:00:20,787 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-08-12 20:00:21,290 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-08-12 20:00:22,277 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2021-08-12 20:00:22,853 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2021-08-12 20:00:24,459 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 140 [2021-08-12 20:00:24,993 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2021-08-12 20:00:26,336 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-08-12 20:00:27,680 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-08-12 20:00:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:29,573 INFO L93 Difference]: Finished difference Result 2673 states and 8696 transitions. [2021-08-12 20:00:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 20:00:29,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 20:00:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:29,580 INFO L225 Difference]: With dead ends: 2673 [2021-08-12 20:00:29,580 INFO L226 Difference]: Without dead ends: 2637 [2021-08-12 20:00:29,580 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 9246.6ms TimeCoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:00:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-08-12 20:00:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1837. [2021-08-12 20:00:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.411764705882353) internal successors, (6264), 1836 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6264 transitions. [2021-08-12 20:00:30,485 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6264 transitions. Word has length 26 [2021-08-12 20:00:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:30,485 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6264 transitions. [2021-08-12 20:00:30,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 20:00:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6264 transitions. [2021-08-12 20:00:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:00:30,488 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:30,489 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:30,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-08-12 20:00:30,712 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:30,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash 461518918, now seen corresponding path program 31 times [2021-08-12 20:00:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:30,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18079881] [2021-08-12 20:00:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:31,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:31,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18079881] [2021-08-12 20:00:31,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18079881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:31,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224414184] [2021-08-12 20:00:31,154 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 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 [2021-08-12 20:00:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:31,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:00:31,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:31,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:31,564 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 43 treesize of output 31 [2021-08-12 20:00:31,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,576 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:31,577 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 40 treesize of output 22 [2021-08-12 20:00:31,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:31,591 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 40 treesize of output 28 [2021-08-12 20:00:31,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,611 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:00:31,611 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 23 [2021-08-12 20:00:31,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,630 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:00:31,631 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 23 [2021-08-12 20:00:31,633 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,647 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:31,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-08-12 20:00:31,648 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,661 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:31,662 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 45 treesize of output 27 [2021-08-12 20:00:31,662 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,674 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:31,675 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 50 treesize of output 30 [2021-08-12 20:00:31,675 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:31,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-08-12 20:00:31,688 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,702 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:31,702 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 45 treesize of output 27 [2021-08-12 20:00:31,703 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,716 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:31,716 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 47 treesize of output 25 [2021-08-12 20:00:31,717 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:31,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-08-12 20:00:31,737 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:31,754 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 34 treesize of output 30 [2021-08-12 20:00:31,756 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:31,797 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 45 treesize of output 31 [2021-08-12 20:00:31,800 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,816 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:00:31,816 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 38 treesize of output 24 [2021-08-12 20:00:31,818 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:31,827 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:31,827 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 42 treesize of output 22 [2021-08-12 20:00:31,828 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:31,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:31,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:00:31,924 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-08-12 20:00:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:32,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224414184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:32,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:32,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 20:00:32,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219126048] [2021-08-12 20:00:32,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:00:32,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:00:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:00:32,199 INFO L87 Difference]: Start difference. First operand 1837 states and 6264 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:00:33,179 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-08-12 20:00:34,571 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-08-12 20:00:35,290 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-08-12 20:00:36,077 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-08-12 20:00:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:38,506 INFO L93 Difference]: Finished difference Result 2620 states and 8668 transitions. [2021-08-12 20:00:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:00:38,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 20:00:38,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:38,511 INFO L225 Difference]: With dead ends: 2620 [2021-08-12 20:00:38,512 INFO L226 Difference]: Without dead ends: 2584 [2021-08-12 20:00:38,512 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2650.3ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 20:00:38,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-08-12 20:00:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1832. [2021-08-12 20:00:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.409612233752048) internal successors, (6243), 1831 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6243 transitions. [2021-08-12 20:00:39,235 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6243 transitions. Word has length 26 [2021-08-12 20:00:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:39,236 INFO L482 AbstractCegarLoop]: Abstraction has 1832 states and 6243 transitions. [2021-08-12 20:00:39,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:00:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6243 transitions. [2021-08-12 20:00:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:00:39,238 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:39,238 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:39,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:39,453 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:39,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 32 times [2021-08-12 20:00:39,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:39,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319379201] [2021-08-12 20:00:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:39,724 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-08-12 20:00:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:39,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319379201] [2021-08-12 20:00:39,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319379201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032227814] [2021-08-12 20:00:39,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:40,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:00:40,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:40,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:00:40,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:40,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:40,460 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 16 treesize of output 26 [2021-08-12 20:00:40,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:40,479 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:00:40,479 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 21 treesize of output 25 [2021-08-12 20:00:40,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:40,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:40,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:40,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-08-12 20:00:40,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:40,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:40,605 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 33 treesize of output 35 [2021-08-12 20:00:40,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:40,721 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-08-12 20:00:40,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:40,735 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:00:40,736 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 24 [2021-08-12 20:00:40,737 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:40,750 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:00:40,750 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 28 [2021-08-12 20:00:40,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:40,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:40,858 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:00:40,858 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 26 treesize of output 28 [2021-08-12 20:00:40,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:40,871 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:00:40,871 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 21 treesize of output 21 [2021-08-12 20:00:40,872 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:40,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:40,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:00:40,998 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:430 [2021-08-12 20:00:41,192 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-08-12 20:00:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:41,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032227814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:41,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:41,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:00:41,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640178617] [2021-08-12 20:00:41,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:00:41,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:41,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:00:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:00:41,430 INFO L87 Difference]: Start difference. First operand 1832 states and 6243 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 20:00:42,046 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-08-12 20:00:42,196 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-08-12 20:00:42,369 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-08-12 20:00:43,022 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-08-12 20:00:43,416 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-08-12 20:00:43,711 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-08-12 20:00:44,122 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-08-12 20:00:44,577 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-08-12 20:00:44,966 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-08-12 20:00:45,286 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-08-12 20:00:45,926 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-08-12 20:00:49,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:49,539 INFO L93 Difference]: Finished difference Result 2649 states and 8629 transitions. [2021-08-12 20:00:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 20:00:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 20:00:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:49,546 INFO L225 Difference]: With dead ends: 2649 [2021-08-12 20:00:49,546 INFO L226 Difference]: Without dead ends: 2578 [2021-08-12 20:00:49,547 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4523.2ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 20:00:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-08-12 20:00:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1826. [2021-08-12 20:00:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.4076712328767123) internal successors, (6219), 1825 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6219 transitions. [2021-08-12 20:00:50,440 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6219 transitions. Word has length 26 [2021-08-12 20:00:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:50,440 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6219 transitions. [2021-08-12 20:00:50,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 20:00:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6219 transitions. [2021-08-12 20:00:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:00:50,443 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:50,443 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:50,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1963,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:50,660 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-08-12 20:00:50,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:50,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958980491] [2021-08-12 20:00:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:50,892 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-08-12 20:00:51,011 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-08-12 20:00:51,163 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-08-12 20:00:51,342 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-08-12 20:00:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:51,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:51,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958980491] [2021-08-12 20:00:51,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958980491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:51,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538460499] [2021-08-12 20:00:51,389 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 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 [2021-08-12 20:00:51,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:00:51,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:51,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:00:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:51,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,847 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 30 treesize of output 16 [2021-08-12 20:00:51,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,854 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 28 treesize of output 13 [2021-08-12 20:00:51,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,861 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 37 treesize of output 19 [2021-08-12 20:00:51,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,868 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 35 treesize of output 19 [2021-08-12 20:00:51,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,875 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 41 treesize of output 13 [2021-08-12 20:00:51,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,882 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 30 treesize of output 16 [2021-08-12 20:00:51,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,889 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 28 treesize of output 13 [2021-08-12 20:00:51,889 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,896 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 39 treesize of output 16 [2021-08-12 20:00:51,896 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,903 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 39 treesize of output 13 [2021-08-12 20:00:51,904 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,910 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 23 treesize of output 7 [2021-08-12 20:00:51,911 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,918 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 32 treesize of output 16 [2021-08-12 20:00:51,918 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,924 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 41 treesize of output 16 [2021-08-12 20:00:51,925 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,931 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 34 treesize of output 16 [2021-08-12 20:00:51,932 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,938 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 33 treesize of output 13 [2021-08-12 20:00:51,939 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,945 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 35 treesize of output 19 [2021-08-12 20:00:51,945 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:51,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:51,949 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 39 treesize of output 19 [2021-08-12 20:00:51,949 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:51,977 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-08-12 20:00:51,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:00:51,978 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:21 [2021-08-12 20:00:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:52,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538460499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:52,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:52,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 20:00:52,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140642862] [2021-08-12 20:00:52,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:00:52,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:52,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:00:52,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:00:52,007 INFO L87 Difference]: Start difference. First operand 1826 states and 6219 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-12 20:00:52,554 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-08-12 20:00:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:56,821 INFO L93 Difference]: Finished difference Result 2338 states and 7725 transitions. [2021-08-12 20:00:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:00:56,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-12 20:00:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:56,827 INFO L225 Difference]: With dead ends: 2338 [2021-08-12 20:00:56,827 INFO L226 Difference]: Without dead ends: 2314 [2021-08-12 20:00:56,827 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2037.6ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 20:00:56,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-08-12 20:00:57,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1818. [2021-08-12 20:00:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-08-12 20:00:57,598 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-08-12 20:00:57,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:57,598 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-08-12 20:00:57,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-12 20:00:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-08-12 20:00:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:00:57,601 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:57,601 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:57,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-08-12 20:00:57,817 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-08-12 20:00:57,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:57,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090811250] [2021-08-12 20:00:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:58,076 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-08-12 20:00:58,211 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-08-12 20:00:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:58,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:58,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090811250] [2021-08-12 20:00:58,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090811250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:58,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579816442] [2021-08-12 20:00:58,508 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 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 [2021-08-12 20:00:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:58,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:00:58,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:58,913 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-08-12 20:00:58,971 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_263, v_prenex_259], 5=[A, v_prenex_261]} [2021-08-12 20:00:58,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:58,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:58,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:58,977 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 23 treesize of output 13 [2021-08-12 20:00:58,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:59,086 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-08-12 20:00:59,087 INFO L628 ElimStorePlain]: treesize reduction 150, result has 45.5 percent of original size [2021-08-12 20:00:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:59,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:59,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:59,092 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 23 treesize of output 13 [2021-08-12 20:00:59,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:59,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:59,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:59,131 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 27 treesize of output 13 [2021-08-12 20:00:59,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:59,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:00:59,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:59,167 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 27 treesize of output 13 [2021-08-12 20:00:59,168 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:59,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:59,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:00:59,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:41 [2021-08-12 20:00:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:59,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579816442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:59,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:59,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 20:00:59,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935059842] [2021-08-12 20:00:59,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:00:59,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:59,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:00:59,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:00:59,252 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 20:01:02,810 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-08-12 20:01:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:05,590 INFO L93 Difference]: Finished difference Result 2528 states and 8352 transitions. [2021-08-12 20:01:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 20:01:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-12 20:01:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:05,597 INFO L225 Difference]: With dead ends: 2528 [2021-08-12 20:01:05,597 INFO L226 Difference]: Without dead ends: 2511 [2021-08-12 20:01:05,598 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2887.9ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 20:01:05,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-08-12 20:01:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1818. [2021-08-12 20:01:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-08-12 20:01:06,518 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-08-12 20:01:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:06,518 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-08-12 20:01:06,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 20:01:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-08-12 20:01:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:06,521 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:06,521 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:06,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:06,741 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-08-12 20:01:06,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:06,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518143805] [2021-08-12 20:01:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:07,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:07,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518143805] [2021-08-12 20:01:07,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518143805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:07,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56635447] [2021-08-12 20:01:07,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:07,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:01:07,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:01:07,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:07,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,438 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-08-12 20:01:07,438 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 39 treesize of output 33 [2021-08-12 20:01:07,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,465 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-08-12 20:01:07,466 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 41 treesize of output 26 [2021-08-12 20:01:07,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,491 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-08-12 20:01:07,491 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 39 treesize of output 25 [2021-08-12 20:01:07,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,516 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-08-12 20:01:07,516 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 32 treesize of output 30 [2021-08-12 20:01:07,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,534 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:01:07,534 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 41 treesize of output 1 [2021-08-12 20:01:07,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,562 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-08-12 20:01:07,563 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 32 treesize of output 34 [2021-08-12 20:01:07,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,591 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-08-12 20:01:07,591 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 39 treesize of output 26 [2021-08-12 20:01:07,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,609 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:01:07,609 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 34 treesize of output 1 [2021-08-12 20:01:07,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,627 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:01:07,627 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 32 treesize of output 1 [2021-08-12 20:01:07,627 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,652 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-08-12 20:01:07,652 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 32 treesize of output 23 [2021-08-12 20:01:07,653 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:07,681 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 [2021-08-12 20:01:07,688 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,705 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:01:07,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-08-12 20:01:07,706 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,721 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:01:07,721 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 41 treesize of output 1 [2021-08-12 20:01:07,722 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,736 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:01:07,736 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 34 treesize of output 1 [2021-08-12 20:01:07,737 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,758 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:01:07,758 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 39 treesize of output 1 [2021-08-12 20:01:07,759 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:07,768 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:01:07,768 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 43 treesize of output 1 [2021-08-12 20:01:07,768 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:07,853 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-08-12 20:01:07,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:01:07,854 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-08-12 20:01:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:07,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56635447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:07,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:07,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-12 20:01:07,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003624331] [2021-08-12 20:01:07,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:01:07,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:07,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:01:07,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:01:07,946 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2021-08-12 20:01:10,998 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-08-12 20:01:11,143 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-08-12 20:01:14,792 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-08-12 20:01:16,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:16,891 INFO L93 Difference]: Finished difference Result 3019 states and 9723 transitions. [2021-08-12 20:01:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 20:01:16,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 26 [2021-08-12 20:01:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:16,897 INFO L225 Difference]: With dead ends: 3019 [2021-08-12 20:01:16,897 INFO L226 Difference]: Without dead ends: 2970 [2021-08-12 20:01:16,898 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3708.4ms TimeCoverageRelationStatistics Valid=708, Invalid=3452, Unknown=0, NotChecked=0, Total=4160 [2021-08-12 20:01:16,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-08-12 20:01:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1841. [2021-08-12 20:01:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3967391304347827) internal successors, (6250), 1840 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6250 transitions. [2021-08-12 20:01:17,700 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6250 transitions. Word has length 26 [2021-08-12 20:01:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:17,700 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6250 transitions. [2021-08-12 20:01:17,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2021-08-12 20:01:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6250 transitions. [2021-08-12 20:01:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:17,702 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:17,702 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-08-12 20:01:17,917 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-08-12 20:01:17,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:17,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107557152] [2021-08-12 20:01:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:18,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:18,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107557152] [2021-08-12 20:01:18,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107557152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:18,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106975530] [2021-08-12 20:01:18,344 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 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 [2021-08-12 20:01:18,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 20:01:18,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:01:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:18,851 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-08-12 20:01:19,159 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_273, v_prenex_265, v_prenex_277, v_prenex_267, v_prenex_269], 6=[v_prenex_271, v_prenex_275]} [2021-08-12 20:01:19,273 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-12 20:01:19,273 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 51 [2021-08-12 20:01:19,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:19,379 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-08-12 20:01:19,379 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-08-12 20:01:19,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:20,776 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2021-08-12 20:01:20,777 INFO L628 ElimStorePlain]: treesize reduction 5, result has 99.5 percent of original size [2021-08-12 20:01:20,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:20,833 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-08-12 20:01:20,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:20,904 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-12 20:01:20,905 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-08-12 20:01:20,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:22,685 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 183 DAG size of output: 171 [2021-08-12 20:01:22,686 INFO L628 ElimStorePlain]: treesize reduction 45, result has 95.3 percent of original size [2021-08-12 20:01:22,760 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-08-12 20:01:22,761 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-08-12 20:01:22,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:22,838 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-08-12 20:01:22,838 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-08-12 20:01:22,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:23,986 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 182 DAG size of output: 176 [2021-08-12 20:01:23,987 INFO L628 ElimStorePlain]: treesize reduction 44, result has 95.4 percent of original size [2021-08-12 20:01:24,038 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-08-12 20:01:24,038 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-08-12 20:01:24,044 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:24,081 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-12 20:01:24,081 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-08-12 20:01:24,089 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:24,826 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 167 [2021-08-12 20:01:24,827 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.0 percent of original size [2021-08-12 20:01:24,871 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-08-12 20:01:24,871 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-08-12 20:01:24,874 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:24,907 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-08-12 20:01:24,907 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-08-12 20:01:24,911 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:25,291 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-08-12 20:01:25,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:25,325 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-08-12 20:01:25,325 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-08-12 20:01:25,327 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:25,359 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-08-12 20:01:25,360 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-08-12 20:01:25,362 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:25,713 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-08-12 20:01:25,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:25,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:25,742 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-08-12 20:01:25,755 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:25,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:25,788 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-08-12 20:01:25,788 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-08-12 20:01:25,794 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:26,125 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-08-12 20:01:26,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:26,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:26,164 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-08-12 20:01:26,164 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-08-12 20:01:26,174 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:26,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:26,188 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-12 20:01:26,188 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-08-12 20:01:26,188 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:26,485 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-08-12 20:01:26,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:26,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-08-12 20:01:26,539 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:957, output treesize:1656 [2021-08-12 20:01:26,953 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-08-12 20:01:27,160 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-08-12 20:01:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:27,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106975530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:27,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:27,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-12 20:01:27,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373109610] [2021-08-12 20:01:27,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 20:01:27,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 20:01:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-12 20:01:27,329 INFO L87 Difference]: Start difference. First operand 1841 states and 6250 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-08-12 20:01:27,929 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2021-08-12 20:01:28,903 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-08-12 20:01:29,352 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-08-12 20:01:29,989 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2021-08-12 20:01:30,469 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-08-12 20:01:30,745 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-08-12 20:01:30,914 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-08-12 20:01:31,211 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2021-08-12 20:01:32,050 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 76 [2021-08-12 20:01:32,279 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-08-12 20:01:32,504 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 50 [2021-08-12 20:01:33,258 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2021-08-12 20:01:34,986 WARN L205 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 77 [2021-08-12 20:01:36,065 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-08-12 20:01:36,563 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-08-12 20:01:37,611 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 33 [2021-08-12 20:01:37,859 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 39 [2021-08-12 20:01:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:39,699 INFO L93 Difference]: Finished difference Result 3179 states and 10245 transitions. [2021-08-12 20:01:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 20:01:39,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 26 [2021-08-12 20:01:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:39,706 INFO L225 Difference]: With dead ends: 3179 [2021-08-12 20:01:39,707 INFO L226 Difference]: Without dead ends: 3132 [2021-08-12 20:01:39,707 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 8059.9ms TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2021-08-12 20:01:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-08-12 20:01:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1888. [2021-08-12 20:01:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.3995760466348703) internal successors, (6415), 1887 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6415 transitions. [2021-08-12 20:01:40,554 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6415 transitions. Word has length 26 [2021-08-12 20:01:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:40,554 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6415 transitions. [2021-08-12 20:01:40,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-08-12 20:01:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6415 transitions. [2021-08-12 20:01:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:40,557 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:40,557 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:40,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2138 [2021-08-12 20:01:40,760 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-08-12 20:01:40,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:40,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138438041] [2021-08-12 20:01:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:41,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:41,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138438041] [2021-08-12 20:01:41,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138438041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:41,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044461999] [2021-08-12 20:01:41,224 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 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 [2021-08-12 20:01:41,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:01:41,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:01:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:41,603 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-08-12 20:01:41,733 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_287], 6=[v_prenex_285, v_prenex_289]} [2021-08-12 20:01:41,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,740 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 27 treesize of output 13 [2021-08-12 20:01:41,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,745 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 34 treesize of output 13 [2021-08-12 20:01:41,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,847 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-08-12 20:01:41,847 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-08-12 20:01:41,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,851 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 13 treesize of output 7 [2021-08-12 20:01:41,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-12 20:01:41,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,924 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 25 treesize of output 13 [2021-08-12 20:01:41,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:41,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:01:41,952 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-08-12 20:01:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044461999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:42,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:42,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 20:01:42,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258060792] [2021-08-12 20:01:42,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:01:42,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:42,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:01:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:01:42,003 INFO L87 Difference]: Start difference. First operand 1888 states and 6415 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 20:01:43,608 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-08-12 20:01:43,978 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-08-12 20:01:44,901 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-08-12 20:01:45,059 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-08-12 20:01:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:48,053 INFO L93 Difference]: Finished difference Result 2397 states and 7937 transitions. [2021-08-12 20:01:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:01:48,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-12 20:01:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:48,058 INFO L225 Difference]: With dead ends: 2397 [2021-08-12 20:01:48,059 INFO L226 Difference]: Without dead ends: 2380 [2021-08-12 20:01:48,059 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2722.1ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 20:01:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-08-12 20:01:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1886. [2021-08-12 20:01:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-08-12 20:01:48,894 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-08-12 20:01:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:48,894 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-08-12 20:01:48,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-12 20:01:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-08-12 20:01:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:48,897 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:48,897 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:49,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2263 [2021-08-12 20:01:49,113 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:49,113 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-08-12 20:01:49,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:49,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537562838] [2021-08-12 20:01:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:49,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:49,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537562838] [2021-08-12 20:01:49,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537562838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:49,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959017225] [2021-08-12 20:01:49,526 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 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 [2021-08-12 20:01:49,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 20:01:49,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:49,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:01:49,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:50,017 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-08-12 20:01:50,261 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-08-12 20:01:50,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:50,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:50,505 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-08-12 20:01:50,506 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 28 treesize of output 26 [2021-08-12 20:01:50,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:50,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:50,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:50,567 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 [2021-08-12 20:01:50,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,022 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-08-12 20:01:51,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:51,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,066 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-08-12 20:01:51,066 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 33 treesize of output 43 [2021-08-12 20:01:51,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,097 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-08-12 20:01:51,097 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 28 treesize of output 30 [2021-08-12 20:01:51,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,493 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-08-12 20:01:51,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,528 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:01:51,529 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 39 treesize of output 35 [2021-08-12 20:01:51,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,555 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-08-12 20:01:51,555 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 34 treesize of output 28 [2021-08-12 20:01:51,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,910 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-08-12 20:01:51,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:51,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,942 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-08-12 20:01:51,942 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 41 treesize of output 33 [2021-08-12 20:01:51,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:51,968 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 41 treesize of output 47 [2021-08-12 20:01:51,975 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:52,632 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 140 [2021-08-12 20:01:52,632 INFO L628 ElimStorePlain]: treesize reduction 36, result has 94.8 percent of original size [2021-08-12 20:01:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:52,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:52,664 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 39 treesize of output 47 [2021-08-12 20:01:52,669 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:52,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:52,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:52,696 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-08-12 20:01:52,697 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 39 treesize of output 33 [2021-08-12 20:01:52,700 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:53,266 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2021-08-12 20:01:53,266 INFO L628 ElimStorePlain]: treesize reduction 38, result has 94.0 percent of original size [2021-08-12 20:01:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:53,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:53,301 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-08-12 20:01:53,301 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 32 treesize of output 26 [2021-08-12 20:01:53,303 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:53,333 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:01:53,333 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 37 treesize of output 35 [2021-08-12 20:01:53,336 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:53,649 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-08-12 20:01:53,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:53,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:53,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:53,687 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:01:53,688 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 35 treesize of output 35 [2021-08-12 20:01:53,692 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:53,708 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:01:53,709 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 35 treesize of output 1 [2021-08-12 20:01:53,709 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:53,972 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-08-12 20:01:53,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:54,003 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-08-12 20:01:54,003 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 30 treesize of output 26 [2021-08-12 20:01:54,005 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:54,031 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:01:54,031 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 30 treesize of output 32 [2021-08-12 20:01:54,036 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:54,484 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-08-12 20:01:54,484 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.7 percent of original size [2021-08-12 20:01:54,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-08-12 20:01:54,500 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:841, output treesize:391 [2021-08-12 20:01:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:54,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959017225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:54,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:54,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-12 20:01:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975787316] [2021-08-12 20:01:54,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 20:01:54,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:54,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 20:01:54,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-12 20:01:54,643 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 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) [2021-08-12 20:01:54,996 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-08-12 20:01:55,281 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-08-12 20:02:00,145 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-08-12 20:02:11,963 WARN L205 SmtUtils]: Spent 11.11 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-08-12 20:02:12,827 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 154 [2021-08-12 20:02:13,726 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-08-12 20:02:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:16,405 INFO L93 Difference]: Finished difference Result 2714 states and 8980 transitions. [2021-08-12 20:02:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 20:02:16,406 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 26 [2021-08-12 20:02:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:16,412 INFO L225 Difference]: With dead ends: 2714 [2021-08-12 20:02:16,412 INFO L226 Difference]: Without dead ends: 2682 [2021-08-12 20:02:16,413 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 18007.3ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:02:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-08-12 20:02:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1886. [2021-08-12 20:02:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-08-12 20:02:17,436 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-08-12 20:02:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:17,436 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-08-12 20:02:17,437 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) [2021-08-12 20:02:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-08-12 20:02:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:17,439 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:17,440 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:17,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2277 [2021-08-12 20:02:17,663 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 54 times [2021-08-12 20:02:17,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:17,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905567823] [2021-08-12 20:02:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:18,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905567823] [2021-08-12 20:02:18,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905567823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076282146] [2021-08-12 20:02:18,136 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 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 [2021-08-12 20:02:18,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:02:18,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:18,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:02:18,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:18,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,363 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-08-12 20:02:18,363 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 32 treesize of output 30 [2021-08-12 20:02:18,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,393 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-08-12 20:02:18,393 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 39 treesize of output 33 [2021-08-12 20:02:18,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,412 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,412 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 32 treesize of output 1 [2021-08-12 20:02:18,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,429 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,429 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 39 treesize of output 1 [2021-08-12 20:02:18,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,455 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-08-12 20:02:18,455 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 32 treesize of output 34 [2021-08-12 20:02:18,458 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:18,483 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 [2021-08-12 20:02:18,488 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,504 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,504 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 34 treesize of output 1 [2021-08-12 20:02:18,504 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,520 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,520 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 32 treesize of output 1 [2021-08-12 20:02:18,521 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,536 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,537 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 41 treesize of output 1 [2021-08-12 20:02:18,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,560 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-08-12 20:02:18,560 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 39 treesize of output 25 [2021-08-12 20:02:18,561 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,576 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,577 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 41 treesize of output 1 [2021-08-12 20:02:18,577 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,592 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,592 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 43 treesize of output 1 [2021-08-12 20:02:18,593 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,608 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,608 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 41 treesize of output 1 [2021-08-12 20:02:18,608 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,623 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,623 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 39 treesize of output 1 [2021-08-12 20:02:18,624 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,638 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,638 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 34 treesize of output 1 [2021-08-12 20:02:18,638 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:18,647 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-08-12 20:02:18,647 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 41 treesize of output 1 [2021-08-12 20:02:18,647 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:18,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:02:18,685 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-08-12 20:02:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:18,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076282146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:18,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:18,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 20:02:18,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442194134] [2021-08-12 20:02:18,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:02:18,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:18,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:02:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:02:18,776 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-12 20:02:19,512 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-08-12 20:02:19,754 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-08-12 20:02:20,358 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-08-12 20:02:21,116 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-08-12 20:02:21,772 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-08-12 20:02:22,583 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-08-12 20:02:22,785 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-08-12 20:02:23,849 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-08-12 20:02:24,039 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-08-12 20:02:24,428 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-08-12 20:02:25,766 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-08-12 20:02:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:28,971 INFO L93 Difference]: Finished difference Result 3400 states and 10885 transitions. [2021-08-12 20:02:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-12 20:02:28,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-12 20:02:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:28,979 INFO L225 Difference]: With dead ends: 3400 [2021-08-12 20:02:28,979 INFO L226 Difference]: Without dead ends: 3364 [2021-08-12 20:02:28,980 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3963.2ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 20:02:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-08-12 20:02:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 1892. [2021-08-12 20:02:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.405076679005817) internal successors, (6439), 1891 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6439 transitions. [2021-08-12 20:02:29,955 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6439 transitions. Word has length 26 [2021-08-12 20:02:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:29,955 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6439 transitions. [2021-08-12 20:02:29,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-12 20:02:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6439 transitions. [2021-08-12 20:02:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:29,958 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:29,958 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:30,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2347 [2021-08-12 20:02:30,177 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:30,177 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 33 times [2021-08-12 20:02:30,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:30,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849948300] [2021-08-12 20:02:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:30,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:30,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849948300] [2021-08-12 20:02:30,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849948300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:30,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195418171] [2021-08-12 20:02:30,597 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 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 [2021-08-12 20:02:30,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:02:30,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:02:30,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:31,078 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-08-12 20:02:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:31,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:31,193 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 21 treesize of output 13 [2021-08-12 20:02:31,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:31,342 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-08-12 20:02:31,342 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-08-12 20:02:31,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:31,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:31,346 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 21 treesize of output 13 [2021-08-12 20:02:31,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:31,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:31,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:31,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:31,406 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 [2021-08-12 20:02:31,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:31,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:31,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:31,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:31,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:31,463 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 [2021-08-12 20:02:31,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:31,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:31,467 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 21 treesize of output 13 [2021-08-12 20:02:31,468 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:31,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:31,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:02:31,512 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-08-12 20:02:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:31,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195418171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:31,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:31,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:02:31,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732934374] [2021-08-12 20:02:31,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:02:31,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:31,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:02:31,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:02:31,562 INFO L87 Difference]: Start difference. First operand 1892 states and 6439 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-08-12 20:02:32,535 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-08-12 20:02:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:35,489 INFO L93 Difference]: Finished difference Result 2315 states and 7727 transitions. [2021-08-12 20:02:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:02:35,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-08-12 20:02:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:35,495 INFO L225 Difference]: With dead ends: 2315 [2021-08-12 20:02:35,495 INFO L226 Difference]: Without dead ends: 2298 [2021-08-12 20:02:35,495 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1457.9ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:02:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-08-12 20:02:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1884. [2021-08-12 20:02:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.4083908656399364) internal successors, (6418), 1883 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6418 transitions. [2021-08-12 20:02:36,297 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6418 transitions. Word has length 26 [2021-08-12 20:02:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:36,298 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6418 transitions. [2021-08-12 20:02:36,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-08-12 20:02:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6418 transitions. [2021-08-12 20:02:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:36,300 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:36,300 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:36,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-08-12 20:02:36,517 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:36,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:36,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1200955766, now seen corresponding path program 34 times [2021-08-12 20:02:36,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:36,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981041052] [2021-08-12 20:02:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:36,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:36,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981041052] [2021-08-12 20:02:36,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981041052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:36,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763478445] [2021-08-12 20:02:36,892 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 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 [2021-08-12 20:02:36,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:02:36,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:36,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:02:36,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:37,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,217 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 21 treesize of output 13 [2021-08-12 20:02:37,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,223 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 [2021-08-12 20:02:37,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,231 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 26 treesize of output 13 [2021-08-12 20:02:37,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,239 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 36 treesize of output 19 [2021-08-12 20:02:37,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,247 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 31 treesize of output 19 [2021-08-12 20:02:37,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-08-12 20:02:37,256 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,264 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 33 treesize of output 19 [2021-08-12 20:02:37,265 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,272 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 [2021-08-12 20:02:37,273 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,280 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 33 treesize of output 19 [2021-08-12 20:02:37,281 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,288 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 33 treesize of output 19 [2021-08-12 20:02:37,289 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,296 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 21 treesize of output 13 [2021-08-12 20:02:37,297 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-08-12 20:02:37,304 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,311 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-08-12 20:02:37,312 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,318 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 33 treesize of output 19 [2021-08-12 20:02:37,319 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:37,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:37,323 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 31 treesize of output 19 [2021-08-12 20:02:37,324 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:37,408 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-08-12 20:02:37,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:02:37,410 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-08-12 20:02:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:37,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763478445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:37,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:37,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:02:37,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284120507] [2021-08-12 20:02:37,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:02:37,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:37,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:02:37,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:02:37,473 INFO L87 Difference]: Start difference. First operand 1884 states and 6418 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-08-12 20:02:37,815 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-08-12 20:02:37,962 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-08-12 20:02:38,245 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-08-12 20:02:39,226 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-08-12 20:02:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:42,965 INFO L93 Difference]: Finished difference Result 2551 states and 8457 transitions. [2021-08-12 20:02:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 20:02:42,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-08-12 20:02:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:42,971 INFO L225 Difference]: With dead ends: 2551 [2021-08-12 20:02:42,972 INFO L226 Difference]: Without dead ends: 2534 [2021-08-12 20:02:42,972 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1586.9ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:02:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-08-12 20:02:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1876. [2021-08-12 20:02:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.4074666666666666) internal successors, (6389), 1875 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6389 transitions. [2021-08-12 20:02:43,993 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6389 transitions. Word has length 26 [2021-08-12 20:02:43,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:43,993 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 6389 transitions. [2021-08-12 20:02:43,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-08-12 20:02:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6389 transitions. [2021-08-12 20:02:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:43,996 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:43,996 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:44,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:44,213 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:44,213 INFO L82 PathProgramCache]: Analyzing trace with hash -179287784, now seen corresponding path program 35 times [2021-08-12 20:02:44,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:44,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986225574] [2021-08-12 20:02:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:44,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:44,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986225574] [2021-08-12 20:02:44,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986225574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:44,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383533876] [2021-08-12 20:02:44,610 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 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 [2021-08-12 20:02:44,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 20:02:44,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:02:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:45,177 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:02:45,177 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 21 treesize of output 21 [2021-08-12 20:02:45,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:45,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:45,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:45,195 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 16 treesize of output 26 [2021-08-12 20:02:45,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:45,362 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-08-12 20:02:45,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:45,386 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:02:45,386 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 26 treesize of output 28 [2021-08-12 20:02:45,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:45,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:45,407 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:02:45,407 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 21 treesize of output 25 [2021-08-12 20:02:45,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:45,544 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-08-12 20:02:45,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:45,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:45,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:45,561 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 33 treesize of output 35 [2021-08-12 20:02:45,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:45,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:45,578 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:02:45,579 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 24 [2021-08-12 20:02:45,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:45,710 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-08-12 20:02:45,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:45,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:45,731 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:02:45,731 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 28 [2021-08-12 20:02:45,734 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:45,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:45,748 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-08-12 20:02:45,750 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:45,867 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-08-12 20:02:45,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:45,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:02:45,887 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:314 [2021-08-12 20:02:46,093 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-08-12 20:02:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:46,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383533876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:46,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:46,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-12 20:02:46,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501319281] [2021-08-12 20:02:46,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:02:46,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:46,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:02:46,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:02:46,190 INFO L87 Difference]: Start difference. First operand 1876 states and 6389 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 20:02:46,953 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-08-12 20:02:47,130 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-08-12 20:02:47,429 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-08-12 20:02:47,953 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-08-12 20:02:48,379 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-08-12 20:02:48,662 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-08-12 20:02:50,214 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-08-12 20:02:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:51,816 INFO L93 Difference]: Finished difference Result 2286 states and 7584 transitions. [2021-08-12 20:02:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:02:51,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-12 20:02:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:51,822 INFO L225 Difference]: With dead ends: 2286 [2021-08-12 20:02:51,822 INFO L226 Difference]: Without dead ends: 2269 [2021-08-12 20:02:51,822 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2429.1ms TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:02:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-08-12 20:02:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1867. [2021-08-12 20:02:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.404608788853162) internal successors, (6353), 1866 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6353 transitions. [2021-08-12 20:02:52,605 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6353 transitions. Word has length 26 [2021-08-12 20:02:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:52,605 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6353 transitions. [2021-08-12 20:02:52,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-12 20:02:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6353 transitions. [2021-08-12 20:02:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:52,608 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:52,608 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:52,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2424,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:52,825 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:52,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 36 times [2021-08-12 20:02:52,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:52,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73920558] [2021-08-12 20:02:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:53,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:53,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73920558] [2021-08-12 20:02:53,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73920558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:53,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594859689] [2021-08-12 20:02:53,131 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 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 [2021-08-12 20:02:53,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:02:53,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:53,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:02:53,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:53,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,404 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:53,404 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 28 treesize of output 16 [2021-08-12 20:02:53,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,411 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:53,412 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 28 treesize of output 16 [2021-08-12 20:02:53,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,419 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:53,419 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 33 treesize of output 19 [2021-08-12 20:02:53,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,430 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:02:53,430 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 17 [2021-08-12 20:02:53,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:53,441 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 33 treesize of output 27 [2021-08-12 20:02:53,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,453 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:02:53,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17 [2021-08-12 20:02:53,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,463 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:53,463 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 33 treesize of output 19 [2021-08-12 20:02:53,464 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:53,475 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 26 treesize of output 24 [2021-08-12 20:02:53,476 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:53,487 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 16 treesize of output 18 [2021-08-12 20:02:53,490 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,499 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:53,499 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 26 treesize of output 16 [2021-08-12 20:02:53,500 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,509 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:53,509 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 36 treesize of output 22 [2021-08-12 20:02:53,509 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:53,521 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 33 treesize of output 27 [2021-08-12 20:02:53,523 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,535 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:02:53,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-08-12 20:02:53,536 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:53,546 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 28 treesize of output 24 [2021-08-12 20:02:53,550 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,558 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:53,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-08-12 20:02:53,559 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,564 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:53,564 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 19 [2021-08-12 20:02:53,564 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:53,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:02:53,636 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-08-12 20:02:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:53,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594859689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:53,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:53,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 20:02:53,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037405651] [2021-08-12 20:02:53,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:02:53,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:02:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:02:53,810 INFO L87 Difference]: Start difference. First operand 1867 states and 6353 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:02:54,357 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-08-12 20:02:54,905 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-08-12 20:02:55,475 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-08-12 20:02:56,066 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-08-12 20:02:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:58,681 INFO L93 Difference]: Finished difference Result 2066 states and 6912 transitions. [2021-08-12 20:02:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 20:02:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 20:02:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:58,687 INFO L225 Difference]: With dead ends: 2066 [2021-08-12 20:02:58,687 INFO L226 Difference]: Without dead ends: 2049 [2021-08-12 20:02:58,688 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1593.0ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:02:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-08-12 20:02:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1860. [2021-08-12 20:02:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-08-12 20:02:59,662 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-08-12 20:02:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:59,662 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-08-12 20:02:59,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:02:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-08-12 20:02:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:59,665 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:59,665 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:59,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2491,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:59,881 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 37 times [2021-08-12 20:02:59,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:59,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892551648] [2021-08-12 20:02:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:00,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:00,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892551648] [2021-08-12 20:03:00,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892551648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:00,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673810589] [2021-08-12 20:03:00,269 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 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 [2021-08-12 20:03:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:00,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:03:00,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-08-12 20:03:00,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,671 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 36 treesize of output 19 [2021-08-12 20:03:00,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,678 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 26 treesize of output 13 [2021-08-12 20:03:00,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-08-12 20:03:00,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,691 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 21 treesize of output 13 [2021-08-12 20:03:00,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,697 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 33 treesize of output 19 [2021-08-12 20:03:00,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-08-12 20:03:00,704 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,709 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 [2021-08-12 20:03:00,710 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,716 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 21 treesize of output 13 [2021-08-12 20:03:00,716 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,722 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 26 treesize of output 13 [2021-08-12 20:03:00,722 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,727 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 33 treesize of output 19 [2021-08-12 20:03:00,728 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,733 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 28 treesize of output 16 [2021-08-12 20:03:00,734 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,739 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 31 treesize of output 19 [2021-08-12 20:03:00,739 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,744 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 [2021-08-12 20:03:00,745 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,749 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 33 treesize of output 19 [2021-08-12 20:03:00,749 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,833 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-08-12 20:03:00,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:03:00,835 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-08-12 20:03:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:00,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673810589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:00,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:00,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:03:00,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606348642] [2021-08-12 20:03:00,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:03:00,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:00,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:03:00,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:03:00,893 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-08-12 20:03:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:05,309 INFO L93 Difference]: Finished difference Result 2343 states and 7788 transitions. [2021-08-12 20:03:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:03:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-08-12 20:03:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:05,316 INFO L225 Difference]: With dead ends: 2343 [2021-08-12 20:03:05,316 INFO L226 Difference]: Without dead ends: 2320 [2021-08-12 20:03:05,316 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1036.4ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:03:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-08-12 20:03:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1860. [2021-08-12 20:03:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-08-12 20:03:06,332 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-08-12 20:03:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:06,332 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-08-12 20:03:06,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-08-12 20:03:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-08-12 20:03:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:06,334 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:06,334 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:06,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2508 [2021-08-12 20:03:06,545 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 38 times [2021-08-12 20:03:06,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:06,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621063817] [2021-08-12 20:03:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:06,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:06,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621063817] [2021-08-12 20:03:06,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621063817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:06,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367389546] [2021-08-12 20:03:06,875 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 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 [2021-08-12 20:03:06,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:03:06,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:06,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:03:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,196 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:07,196 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 33 treesize of output 19 [2021-08-12 20:03:07,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,207 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:03:07,207 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 17 [2021-08-12 20:03:07,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,216 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:07,216 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 36 treesize of output 22 [2021-08-12 20:03:07,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,224 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:07,224 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 26 treesize of output 16 [2021-08-12 20:03:07,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:07,235 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 16 treesize of output 18 [2021-08-12 20:03:07,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,246 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:07,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-08-12 20:03:07,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:07,257 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 26 treesize of output 24 [2021-08-12 20:03:07,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,267 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:07,267 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 19 [2021-08-12 20:03:07,267 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:07,278 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 33 treesize of output 27 [2021-08-12 20:03:07,279 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:07,290 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 28 treesize of output 24 [2021-08-12 20:03:07,294 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:07,306 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 33 treesize of output 27 [2021-08-12 20:03:07,308 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,319 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:03:07,320 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 17 [2021-08-12 20:03:07,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,330 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:07,330 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 28 treesize of output 16 [2021-08-12 20:03:07,331 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,340 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:07,340 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 28 treesize of output 16 [2021-08-12 20:03:07,340 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,351 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:03:07,351 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 28 treesize of output 20 [2021-08-12 20:03:07,353 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:07,358 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:07,358 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 33 treesize of output 19 [2021-08-12 20:03:07,359 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:07,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:07,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:03:07,448 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-08-12 20:03:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:07,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367389546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:07,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:07,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-12 20:03:07,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283176811] [2021-08-12 20:03:07,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:03:07,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:03:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:03:07,624 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:03:10,215 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-08-12 20:03:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:11,735 INFO L93 Difference]: Finished difference Result 2238 states and 7454 transitions. [2021-08-12 20:03:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:03:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 20:03:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:11,741 INFO L225 Difference]: With dead ends: 2238 [2021-08-12 20:03:11,741 INFO L226 Difference]: Without dead ends: 2207 [2021-08-12 20:03:11,741 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1397.7ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:03:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-08-12 20:03:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1840. [2021-08-12 20:03:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.3953235454051116) internal successors, (6244), 1839 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6244 transitions. [2021-08-12 20:03:12,534 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6244 transitions. Word has length 26 [2021-08-12 20:03:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:12,534 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6244 transitions. [2021-08-12 20:03:12,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:03:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6244 transitions. [2021-08-12 20:03:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:12,537 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:12,537 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:12,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2542 [2021-08-12 20:03:12,754 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:12,754 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-08-12 20:03:12,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:12,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231228519] [2021-08-12 20:03:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:13,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231228519] [2021-08-12 20:03:13,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231228519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113382529] [2021-08-12 20:03:13,014 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 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 [2021-08-12 20:03:13,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:03:13,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:03:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:13,449 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:03:13,449 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 21 treesize of output 25 [2021-08-12 20:03:13,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:13,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:13,475 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:03:13,475 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 26 treesize of output 28 [2021-08-12 20:03:13,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:13,627 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-08-12 20:03:13,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:13,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:13,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:13,646 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 33 treesize of output 35 [2021-08-12 20:03:13,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:13,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:13,668 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:03:13,668 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 33 treesize of output 31 [2021-08-12 20:03:13,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:13,951 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-08-12 20:03:13,952 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-08-12 20:03:13,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:13,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:13,969 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 16 treesize of output 26 [2021-08-12 20:03:13,974 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:13,990 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:03:13,990 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 21 treesize of output 21 [2021-08-12 20:03:13,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:14,125 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-08-12 20:03:14,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:14,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:14,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:14,141 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 [2021-08-12 20:03:14,147 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:14,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:14,163 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:03:14,163 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 24 [2021-08-12 20:03:14,164 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:14,396 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-08-12 20:03:14,397 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-08-12 20:03:14,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:03:14,412 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-08-12 20:03:14,594 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-08-12 20:03:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:14,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113382529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:14,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:14,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-12 20:03:14,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902644916] [2021-08-12 20:03:14,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:03:14,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:03:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:03:14,686 INFO L87 Difference]: Start difference. First operand 1840 states and 6244 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:03:15,965 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-08-12 20:03:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:18,398 INFO L93 Difference]: Finished difference Result 2049 states and 6845 transitions. [2021-08-12 20:03:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 20:03:18,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 20:03:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:18,403 INFO L225 Difference]: With dead ends: 2049 [2021-08-12 20:03:18,403 INFO L226 Difference]: Without dead ends: 2022 [2021-08-12 20:03:18,403 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1218.8ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:03:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-08-12 20:03:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1822. [2021-08-12 20:03:19,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.399231191652938) internal successors, (6190), 1821 states have internal predecessors, (6190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6190 transitions. [2021-08-12 20:03:19,224 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6190 transitions. Word has length 26 [2021-08-12 20:03:19,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:19,224 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6190 transitions. [2021-08-12 20:03:19,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:03:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6190 transitions. [2021-08-12 20:03:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:19,227 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:19,227 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:19,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:19,444 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:19,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:19,444 INFO L82 PathProgramCache]: Analyzing trace with hash 827344434, now seen corresponding path program 40 times [2021-08-12 20:03:19,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:19,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804166017] [2021-08-12 20:03:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:19,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:19,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804166017] [2021-08-12 20:03:19,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804166017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:19,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064672104] [2021-08-12 20:03:19,794 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 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 [2021-08-12 20:03:19,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:03:19,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:19,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:03:19,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:20,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,042 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:20,042 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 35 treesize of output 19 [2021-08-12 20:03:20,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:20,055 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 42 treesize of output 27 [2021-08-12 20:03:20,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,071 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:03:20,072 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 28 treesize of output 17 [2021-08-12 20:03:20,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,084 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:20,084 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 35 treesize of output 19 [2021-08-12 20:03:20,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,096 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:20,096 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 35 treesize of output 19 [2021-08-12 20:03:20,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:20,111 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 33 treesize of output 24 [2021-08-12 20:03:20,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,124 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:20,124 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 30 treesize of output 16 [2021-08-12 20:03:20,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:20,140 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 23 treesize of output 18 [2021-08-12 20:03:20,143 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,157 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:20,157 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 35 treesize of output 19 [2021-08-12 20:03:20,157 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:20,172 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 37 treesize of output 24 [2021-08-12 20:03:20,176 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:20,188 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 30 treesize of output 16 [2021-08-12 20:03:20,189 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:20,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-08-12 20:03:20,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,217 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:03:20,217 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 28 treesize of output 17 [2021-08-12 20:03:20,218 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,230 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:03:20,230 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 30 treesize of output 16 [2021-08-12 20:03:20,231 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:20,245 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 42 treesize of output 27 [2021-08-12 20:03:20,246 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:20,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:20,256 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:03:20,256 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 37 treesize of output 20 [2021-08-12 20:03:20,257 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:20,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:20,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:03:20,332 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-08-12 20:03:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:20,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064672104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:20,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:20,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 20:03:20,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546823776] [2021-08-12 20:03:20,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:03:20,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:03:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:03:20,516 INFO L87 Difference]: Start difference. First operand 1822 states and 6190 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:03:21,096 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-08-12 20:03:22,277 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-08-12 20:03:22,892 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-08-12 20:03:23,709 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-08-12 20:03:24,015 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-08-12 20:03:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:25,853 INFO L93 Difference]: Finished difference Result 2421 states and 8021 transitions. [2021-08-12 20:03:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:03:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 20:03:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:25,859 INFO L225 Difference]: With dead ends: 2421 [2021-08-12 20:03:25,859 INFO L226 Difference]: Without dead ends: 2400 [2021-08-12 20:03:25,859 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2053.8ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 20:03:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-08-12 20:03:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1803. [2021-08-12 20:03:26,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 3.3990011098779136) internal successors, (6125), 1802 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 6125 transitions. [2021-08-12 20:03:26,682 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 6125 transitions. Word has length 26 [2021-08-12 20:03:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:26,683 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 6125 transitions. [2021-08-12 20:03:26,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:03:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 6125 transitions. [2021-08-12 20:03:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:26,685 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:26,685 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:26,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2637,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:26,901 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-08-12 20:03:26,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:26,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134986476] [2021-08-12 20:03:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:27,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:27,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134986476] [2021-08-12 20:03:27,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134986476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:27,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904414863] [2021-08-12 20:03:27,204 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 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 [2021-08-12 20:03:27,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:03:27,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:27,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:03:27,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,549 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 21 treesize of output 13 [2021-08-12 20:03:27,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,554 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 [2021-08-12 20:03:27,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,559 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 33 treesize of output 19 [2021-08-12 20:03:27,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,564 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 [2021-08-12 20:03:27,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,570 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 31 treesize of output 19 [2021-08-12 20:03:27,571 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,576 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 33 treesize of output 19 [2021-08-12 20:03:27,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,582 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 26 treesize of output 13 [2021-08-12 20:03:27,582 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,588 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 36 treesize of output 19 [2021-08-12 20:03:27,588 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 20:03:27,594 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,599 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 31 treesize of output 19 [2021-08-12 20:03:27,600 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,605 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 26 treesize of output 13 [2021-08-12 20:03:27,606 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,611 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 [2021-08-12 20:03:27,612 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,617 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 33 treesize of output 19 [2021-08-12 20:03:27,618 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,630 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 33 treesize of output 19 [2021-08-12 20:03:27,631 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:27,634 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 [2021-08-12 20:03:27,635 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:27,709 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-08-12 20:03:27,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:03:27,710 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-08-12 20:03:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:27,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904414863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:27,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:27,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:03:27,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941903770] [2021-08-12 20:03:27,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:03:27,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:03:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:03:27,767 INFO L87 Difference]: Start difference. First operand 1803 states and 6125 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 20:03:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:31,720 INFO L93 Difference]: Finished difference Result 2312 states and 7690 transitions. [2021-08-12 20:03:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:03:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-12 20:03:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:31,725 INFO L225 Difference]: With dead ends: 2312 [2021-08-12 20:03:31,725 INFO L226 Difference]: Without dead ends: 2295 [2021-08-12 20:03:31,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1032.7ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:03:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-08-12 20:03:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1848. [2021-08-12 20:03:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-08-12 20:03:32,536 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-08-12 20:03:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:32,536 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-08-12 20:03:32,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-08-12 20:03:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-08-12 20:03:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:32,538 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:32,538 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:32,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-08-12 20:03:32,756 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-08-12 20:03:32,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:32,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781452345] [2021-08-12 20:03:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:33,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:33,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781452345] [2021-08-12 20:03:33,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781452345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:33,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91230794] [2021-08-12 20:03:33,014 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 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 [2021-08-12 20:03:33,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:03:33,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:33,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:03:33,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:33,332 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:03:33,332 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 33 treesize of output 19 [2021-08-12 20:03:33,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,348 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:03:33,348 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 21 treesize of output 21 [2021-08-12 20:03:33,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,358 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:03:33,358 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 31 treesize of output 19 [2021-08-12 20:03:33,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,367 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:03:33,367 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 31 treesize of output 19 [2021-08-12 20:03:33,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,385 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:03:33,386 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 24 [2021-08-12 20:03:33,387 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,397 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:03:33,397 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 36 treesize of output 22 [2021-08-12 20:03:33,397 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:33,413 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 16 treesize of output 26 [2021-08-12 20:03:33,417 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,436 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:03:33,436 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 21 treesize of output 25 [2021-08-12 20:03:33,439 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:33,454 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 33 treesize of output 35 [2021-08-12 20:03:33,455 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,473 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:03:33,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-08-12 20:03:33,475 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,483 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:03:33,484 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 16 [2021-08-12 20:03:33,484 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,493 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:03:33,493 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 26 treesize of output 16 [2021-08-12 20:03:33,493 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,512 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:03:33,512 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 28 [2021-08-12 20:03:33,516 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,524 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:03:33,524 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 16 [2021-08-12 20:03:33,525 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,533 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:03:33,534 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 33 treesize of output 19 [2021-08-12 20:03:33,534 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:33,545 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 33 treesize of output 35 [2021-08-12 20:03:33,547 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:33,653 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-08-12 20:03:33,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:33,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:03:33,665 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-08-12 20:03:33,879 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-08-12 20:03:34,080 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-08-12 20:03:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:34,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91230794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:34,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:34,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-12 20:03:34,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683587458] [2021-08-12 20:03:34,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:03:34,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:34,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:03:34,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:03:34,193 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-08-12 20:03:34,641 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-08-12 20:03:36,467 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-08-12 20:03:37,366 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-08-12 20:03:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:39,349 INFO L93 Difference]: Finished difference Result 2572 states and 8521 transitions. [2021-08-12 20:03:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:03:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-08-12 20:03:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:39,355 INFO L225 Difference]: With dead ends: 2572 [2021-08-12 20:03:39,355 INFO L226 Difference]: Without dead ends: 2555 [2021-08-12 20:03:39,356 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1921.4ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:03:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-08-12 20:03:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1848. [2021-08-12 20:03:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-08-12 20:03:40,189 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-08-12 20:03:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:40,189 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-08-12 20:03:40,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-08-12 20:03:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-08-12 20:03:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:40,191 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:40,191 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:40,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2690 [2021-08-12 20:03:40,408 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:40,408 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-08-12 20:03:40,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:40,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098397041] [2021-08-12 20:03:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:40,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:40,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098397041] [2021-08-12 20:03:40,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098397041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:40,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074929207] [2021-08-12 20:03:40,639 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 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 [2021-08-12 20:03:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:40,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:03:40,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:40,952 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_327, v_prenex_329], 3=[A, v_prenex_331]} [2021-08-12 20:03:40,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:40,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:40,960 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 [2021-08-12 20:03:40,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:40,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:40,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:40,965 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 [2021-08-12 20:03:40,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:41,107 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-08-12 20:03:41,107 INFO L628 ElimStorePlain]: treesize reduction 129, result has 54.9 percent of original size [2021-08-12 20:03:41,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:41,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:41,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:41,115 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 [2021-08-12 20:03:41,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:41,120 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 [2021-08-12 20:03:41,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:41,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:41,168 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 11 treesize of output 7 [2021-08-12 20:03:41,169 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:41,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:41,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:41,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:41,212 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 23 treesize of output 13 [2021-08-12 20:03:41,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:41,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:41,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:03:41,253 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:325, output treesize:51 [2021-08-12 20:03:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:41,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074929207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:41,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:41,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 20:03:41,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782964446] [2021-08-12 20:03:41,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:03:41,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:41,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:03:41,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:03:41,312 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:03:42,608 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-08-12 20:03:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:45,373 INFO L93 Difference]: Finished difference Result 2417 states and 8000 transitions. [2021-08-12 20:03:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:03:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 20:03:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:45,379 INFO L225 Difference]: With dead ends: 2417 [2021-08-12 20:03:45,379 INFO L226 Difference]: Without dead ends: 2385 [2021-08-12 20:03:45,379 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 955.2ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:03:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-08-12 20:03:46,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1850. [2021-08-12 20:03:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.3958896700919414) internal successors, (6279), 1849 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:46,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6279 transitions. [2021-08-12 20:03:46,184 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6279 transitions. Word has length 26 [2021-08-12 20:03:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:46,184 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 6279 transitions. [2021-08-12 20:03:46,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:03:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6279 transitions. [2021-08-12 20:03:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:46,186 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:46,186 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:46,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-08-12 20:03:46,401 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-08-12 20:03:46,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:46,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220328233] [2021-08-12 20:03:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:46,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:46,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220328233] [2021-08-12 20:03:46,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220328233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:46,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773725921] [2021-08-12 20:03:46,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:03:46,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:03:46,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:46,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:03:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:47,110 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-08-12 20:03:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:47,288 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:03:47,289 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 21 treesize of output 25 [2021-08-12 20:03:47,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:47,314 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:03:47,314 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 26 treesize of output 28 [2021-08-12 20:03:47,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:47,468 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-08-12 20:03:47,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:47,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:47,487 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 16 treesize of output 26 [2021-08-12 20:03:47,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:47,509 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:03:47,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-08-12 20:03:47,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:47,656 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-08-12 20:03:47,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:47,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:47,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:47,674 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 33 treesize of output 35 [2021-08-12 20:03:47,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:47,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:47,696 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:03:47,696 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 33 treesize of output 31 [2021-08-12 20:03:47,697 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:47,965 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-08-12 20:03:47,966 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-08-12 20:03:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:47,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:47,982 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 [2021-08-12 20:03:47,988 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:47,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:48,003 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:03:48,003 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 24 [2021-08-12 20:03:48,004 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:48,240 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-08-12 20:03:48,240 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.7 percent of original size [2021-08-12 20:03:48,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:03:48,255 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:256 [2021-08-12 20:03:48,440 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-08-12 20:03:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:48,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773725921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:48,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:48,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-12 20:03:48,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954160250] [2021-08-12 20:03:48,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:03:48,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:03:48,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:03:48,531 INFO L87 Difference]: Start difference. First operand 1850 states and 6279 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-08-12 20:03:48,985 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-08-12 20:03:50,607 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-08-12 20:03:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:52,909 INFO L93 Difference]: Finished difference Result 2427 states and 8080 transitions. [2021-08-12 20:03:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 20:03:52,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 26 [2021-08-12 20:03:52,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:52,914 INFO L225 Difference]: With dead ends: 2427 [2021-08-12 20:03:52,914 INFO L226 Difference]: Without dead ends: 2410 [2021-08-12 20:03:52,915 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1495.4ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-12 20:03:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-08-12 20:03:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1868. [2021-08-12 20:03:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.392072844134976) internal successors, (6333), 1867 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6333 transitions. [2021-08-12 20:03:53,779 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6333 transitions. Word has length 26 [2021-08-12 20:03:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:53,779 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6333 transitions. [2021-08-12 20:03:53,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-08-12 20:03:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6333 transitions. [2021-08-12 20:03:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:53,781 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:53,781 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:53,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:53,998 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:53,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:53,998 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-08-12 20:03:53,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:53,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053609521] [2021-08-12 20:03:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:54,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053609521] [2021-08-12 20:03:54,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053609521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097004432] [2021-08-12 20:03:54,351 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 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 [2021-08-12 20:03:54,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:03:54,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:54,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:03:54,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:54,803 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-08-12 20:03:55,045 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-08-12 20:03:55,118 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_349, v_prenex_347], 2=[A, v_prenex_348]} [2021-08-12 20:03:55,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:55,123 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 21 treesize of output 13 [2021-08-12 20:03:55,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:55,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:55,128 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 26 treesize of output 16 [2021-08-12 20:03:55,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:55,262 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-08-12 20:03:55,263 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-08-12 20:03:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:55,267 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 11 treesize of output 7 [2021-08-12 20:03:55,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:55,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:55,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:55,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:55,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:55,321 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 [2021-08-12 20:03:55,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:55,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:55,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:55,326 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 21 treesize of output 13 [2021-08-12 20:03:55,327 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:55,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:55,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:55,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:55,370 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 [2021-08-12 20:03:55,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:55,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:55,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:03:55,409 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:285, output treesize:51 [2021-08-12 20:03:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:55,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097004432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:55,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:55,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:03:55,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368642046] [2021-08-12 20:03:55,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:03:55,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:55,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:03:55,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:03:55,464 INFO L87 Difference]: Start difference. First operand 1868 states and 6333 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-08-12 20:03:57,012 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-08-12 20:03:57,771 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-08-12 20:04:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:00,007 INFO L93 Difference]: Finished difference Result 2323 states and 7747 transitions. [2021-08-12 20:04:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 20:04:00,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-08-12 20:04:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:00,013 INFO L225 Difference]: With dead ends: 2323 [2021-08-12 20:04:00,013 INFO L226 Difference]: Without dead ends: 2306 [2021-08-12 20:04:00,013 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1770.9ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:04:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-08-12 20:04:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1889. [2021-08-12 20:04:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 3.3887711864406778) internal successors, (6398), 1888 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6398 transitions. [2021-08-12 20:04:00,921 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6398 transitions. Word has length 26 [2021-08-12 20:04:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:00,922 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 6398 transitions. [2021-08-12 20:04:00,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-08-12 20:04:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6398 transitions. [2021-08-12 20:04:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:00,924 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:00,924 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:01,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-08-12 20:04:01,140 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:01,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-08-12 20:04:01,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:01,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420710107] [2021-08-12 20:04:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:01,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:01,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420710107] [2021-08-12 20:04:01,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420710107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:01,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146760199] [2021-08-12 20:04:01,413 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 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 [2021-08-12 20:04:01,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:04:01,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:01,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:04:01,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:01,821 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-08-12 20:04:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:01,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:01,879 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 28 treesize of output 24 [2021-08-12 20:04:01,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:01,990 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-08-12 20:04:01,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:02,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,003 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 26 treesize of output 24 [2021-08-12 20:04:02,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:02,110 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-08-12 20:04:02,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:02,123 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:02,123 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 21 treesize of output 17 [2021-08-12 20:04:02,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:02,228 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-08-12 20:04:02,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:02,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,240 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 33 treesize of output 27 [2021-08-12 20:04:02,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:02,342 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-08-12 20:04:02,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:02,354 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:02,354 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 28 treesize of output 20 [2021-08-12 20:04:02,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:02,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:02,467 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:02,467 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 17 [2021-08-12 20:04:02,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:02,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:02,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,574 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 33 treesize of output 27 [2021-08-12 20:04:02,576 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:02,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:02,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,677 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 16 treesize of output 18 [2021-08-12 20:04:02,680 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:02,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:02,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:04:02,772 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-08-12 20:04:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:02,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146760199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:02,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:02,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:04:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458868890] [2021-08-12 20:04:02,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:04:02,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:04:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:04:02,953 INFO L87 Difference]: Start difference. First operand 1889 states and 6398 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-08-12 20:04:04,440 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-08-12 20:04:05,356 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-08-12 20:04:06,408 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-08-12 20:04:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:08,672 INFO L93 Difference]: Finished difference Result 2619 states and 8669 transitions. [2021-08-12 20:04:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:04:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-08-12 20:04:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:08,678 INFO L225 Difference]: With dead ends: 2619 [2021-08-12 20:04:08,678 INFO L226 Difference]: Without dead ends: 2602 [2021-08-12 20:04:08,678 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1855.9ms TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:04:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-08-12 20:04:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1886. [2021-08-12 20:04:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.389920424403183) internal successors, (6390), 1885 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6390 transitions. [2021-08-12 20:04:09,554 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6390 transitions. Word has length 26 [2021-08-12 20:04:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:09,554 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6390 transitions. [2021-08-12 20:04:09,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-08-12 20:04:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6390 transitions. [2021-08-12 20:04:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:09,556 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:09,556 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:09,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2825,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:09,773 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-08-12 20:04:09,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:09,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056050649] [2021-08-12 20:04:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:10,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056050649] [2021-08-12 20:04:10,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056050649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318943217] [2021-08-12 20:04:10,064 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 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 [2021-08-12 20:04:10,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:04:10,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:04:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:10,461 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-08-12 20:04:10,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:10,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:10,556 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 16 treesize of output 18 [2021-08-12 20:04:10,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:10,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:10,568 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:10,568 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 17 [2021-08-12 20:04:10,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:10,688 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-08-12 20:04:10,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:10,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:10,701 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 26 treesize of output 24 [2021-08-12 20:04:10,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:10,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:10,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:10,712 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 17 [2021-08-12 20:04:10,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:10,824 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-08-12 20:04:10,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:10,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:10,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:10,836 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 28 treesize of output 24 [2021-08-12 20:04:10,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:10,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:10,850 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:10,850 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 28 treesize of output 20 [2021-08-12 20:04:10,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:10,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:10,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:10,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:10,961 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 33 treesize of output 27 [2021-08-12 20:04:10,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:10,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:10,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:10,971 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 33 treesize of output 27 [2021-08-12 20:04:10,973 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:11,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:11,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:04:11,074 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-08-12 20:04:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:11,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318943217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:11,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:11,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:04:11,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451185164] [2021-08-12 20:04:11,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:04:11,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:11,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:04:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:04:11,252 INFO L87 Difference]: Start difference. First operand 1886 states and 6390 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:04:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:15,704 INFO L93 Difference]: Finished difference Result 2463 states and 8177 transitions. [2021-08-12 20:04:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 20:04:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 20:04:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:15,710 INFO L225 Difference]: With dead ends: 2463 [2021-08-12 20:04:15,710 INFO L226 Difference]: Without dead ends: 2436 [2021-08-12 20:04:15,710 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1282.0ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:04:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-08-12 20:04:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1886. [2021-08-12 20:04:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-08-12 20:04:16,600 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-08-12 20:04:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:16,600 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-08-12 20:04:16,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:04:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-08-12 20:04:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:16,602 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:16,602 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:16,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-08-12 20:04:16,819 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-08-12 20:04:16,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:16,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454668987] [2021-08-12 20:04:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:17,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:17,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454668987] [2021-08-12 20:04:17,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454668987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:17,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337167365] [2021-08-12 20:04:17,147 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 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 [2021-08-12 20:04:17,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:04:17,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:17,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:04:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:17,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,364 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:17,364 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 28 treesize of output 16 [2021-08-12 20:04:17,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,373 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:17,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-12 20:04:17,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,382 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:17,382 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 33 treesize of output 19 [2021-08-12 20:04:17,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,393 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:17,393 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 17 [2021-08-12 20:04:17,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:17,406 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 33 treesize of output 27 [2021-08-12 20:04:17,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,418 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:17,418 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 17 [2021-08-12 20:04:17,419 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,428 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:17,428 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 33 treesize of output 19 [2021-08-12 20:04:17,429 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:17,440 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 26 treesize of output 24 [2021-08-12 20:04:17,441 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:17,452 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 16 treesize of output 18 [2021-08-12 20:04:17,455 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,463 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:17,464 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 26 treesize of output 16 [2021-08-12 20:04:17,464 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,473 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:17,473 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 36 treesize of output 22 [2021-08-12 20:04:17,474 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:17,485 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 33 treesize of output 27 [2021-08-12 20:04:17,487 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,498 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:17,499 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 28 treesize of output 20 [2021-08-12 20:04:17,500 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:17,510 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 28 treesize of output 24 [2021-08-12 20:04:17,514 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,522 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:17,522 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 19 [2021-08-12 20:04:17,523 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:17,528 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:17,529 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 19 [2021-08-12 20:04:17,529 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:17,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:04:17,601 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-08-12 20:04:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:17,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337167365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:17,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:17,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 20:04:17,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717193549] [2021-08-12 20:04:17,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:04:17,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:04:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:04:17,793 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:04:19,816 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-08-12 20:04:20,624 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-08-12 20:04:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:22,414 INFO L93 Difference]: Finished difference Result 2414 states and 8045 transitions. [2021-08-12 20:04:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 20:04:22,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-12 20:04:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:22,419 INFO L225 Difference]: With dead ends: 2414 [2021-08-12 20:04:22,419 INFO L226 Difference]: Without dead ends: 2397 [2021-08-12 20:04:22,420 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1253.5ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:04:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-08-12 20:04:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1886. [2021-08-12 20:04:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-08-12 20:04:23,333 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-08-12 20:04:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:23,333 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-08-12 20:04:23,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-12 20:04:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-08-12 20:04:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:23,336 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:23,336 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:23,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:23,552 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-08-12 20:04:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:23,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614141002] [2021-08-12 20:04:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:23,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:23,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614141002] [2021-08-12 20:04:23,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614141002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:23,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112779116] [2021-08-12 20:04:23,886 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 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 [2021-08-12 20:04:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:23,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:04:23,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:24,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,384 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 28 treesize of output 13 [2021-08-12 20:04:24,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,392 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 37 treesize of output 19 [2021-08-12 20:04:24,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,399 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 35 treesize of output 19 [2021-08-12 20:04:24,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,407 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 35 treesize of output 19 [2021-08-12 20:04:24,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,414 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 34 treesize of output 16 [2021-08-12 20:04:24,415 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,422 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 33 treesize of output 13 [2021-08-12 20:04:24,424 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,431 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-08-12 20:04:24,432 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,438 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 28 treesize of output 13 [2021-08-12 20:04:24,439 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,446 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 30 treesize of output 16 [2021-08-12 20:04:24,446 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,452 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 39 treesize of output 19 [2021-08-12 20:04:24,453 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,459 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 41 treesize of output 13 [2021-08-12 20:04:24,460 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,467 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 39 treesize of output 13 [2021-08-12 20:04:24,467 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,474 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 32 treesize of output 16 [2021-08-12 20:04:24,474 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,480 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 30 treesize of output 16 [2021-08-12 20:04:24,481 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:24,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:24,484 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 39 treesize of output 16 [2021-08-12 20:04:24,485 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:24,512 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-08-12 20:04:24,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:04:24,513 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-08-12 20:04:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:24,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112779116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:24,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:24,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-12 20:04:24,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111331405] [2021-08-12 20:04:24,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:04:24,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:24,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:04:24,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:04:24,543 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:28,515 INFO L93 Difference]: Finished difference Result 2183 states and 7110 transitions. [2021-08-12 20:04:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 20:04:28,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 26 [2021-08-12 20:04:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:28,520 INFO L225 Difference]: With dead ends: 2183 [2021-08-12 20:04:28,520 INFO L226 Difference]: Without dead ends: 2144 [2021-08-12 20:04:28,520 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 923.7ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:04:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-08-12 20:04:29,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1906. [2021-08-12 20:04:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.391076115485564) internal successors, (6460), 1905 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6460 transitions. [2021-08-12 20:04:29,385 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6460 transitions. Word has length 26 [2021-08-12 20:04:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:29,385 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6460 transitions. [2021-08-12 20:04:29,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6460 transitions. [2021-08-12 20:04:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:29,387 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:29,387 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-08-12 20:04:29,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-08-12 20:04:29,603 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-08-12 20:04:29,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:29,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543523674] [2021-08-12 20:04:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:29,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2988 [2021-08-12 20:04:29,613 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:140) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:245) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:222) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:639) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:285) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:161) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:146) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-12 20:04:29,617 INFO L168 Benchmark]: Toolchain (without parser) took 580491.28 ms. Allocated memory was 178.3 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 158.3 MB in the beginning and 736.8 MB in the end (delta: -578.5 MB). Peak memory consumption was 610.0 MB. Max. memory is 8.0 GB. [2021-08-12 20:04:29,617 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 178.3 MB. Free memory is still 159.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 20:04:29,617 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.65 ms. Allocated memory is still 178.3 MB. Free memory was 158.2 MB in the beginning and 156.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 20:04:29,617 INFO L168 Benchmark]: Boogie Preprocessor took 18.86 ms. Allocated memory is still 178.3 MB. Free memory was 156.8 MB in the beginning and 155.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 20:04:29,617 INFO L168 Benchmark]: RCFGBuilder took 195.49 ms. Allocated memory is still 178.3 MB. Free memory was 155.6 MB in the beginning and 142.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-12 20:04:29,617 INFO L168 Benchmark]: TraceAbstraction took 580252.91 ms. Allocated memory was 178.3 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 142.3 MB in the beginning and 736.8 MB in the end (delta: -594.5 MB). Peak memory consumption was 593.3 MB. Max. memory is 8.0 GB. [2021-08-12 20:04:29,617 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 178.3 MB. Free memory is still 159.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.65 ms. Allocated memory is still 178.3 MB. Free memory was 158.2 MB in the beginning and 156.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.86 ms. Allocated memory is still 178.3 MB. Free memory was 156.8 MB in the beginning and 155.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 195.49 ms. Allocated memory is still 178.3 MB. Free memory was 155.6 MB in the beginning and 142.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 580252.91 ms. Allocated memory was 178.3 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 142.3 MB in the beginning and 736.8 MB in the end (delta: -594.5 MB). Peak memory consumption was 593.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:260) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown