/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/commit-2-alt-dnh.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:38:05,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:38:05,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:38:05,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:38:05,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 19:38:05,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 19:38:05,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 19:38:05,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 19:38:05,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 19:38:05,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 19:38:05,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 19:38:05,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 19:38:05,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 19:38:05,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 19:38:05,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 19:38:05,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 19:38:05,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 19:38:05,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 19:38:05,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 19:38:05,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 19:38:05,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 19:38:05,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 19:38:05,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 19:38:05,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 19:38:05,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 19:38:05,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 19:38:05,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 19:38:05,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 19:38:05,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 19:38:05,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 19:38:05,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 19:38:05,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 19:38:05,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 19:38:05,307 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 [2021-02-19 19:38:05,334 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:38:05,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:38:05,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:38:05,335 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:38:05,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:38:05,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:38:05,336 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:38:05,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:38:05,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:38:05,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:38:05,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:38:05,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:38:05,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:38:05,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:38:05,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:38:05,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:38:05,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:38:05,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:38:05,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:38:05,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:38:05,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:38:05,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:38:05,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:38:05,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:38:05,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:38:05,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:38:05,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:38:05,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:38:05,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:38:05,339 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:38:05,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:38:05,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:38:05,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:38:05,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:38:05,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:38:05,697 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:38:05,699 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:38:05,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/commit-2-alt-dnh.wvr.bpl [2021-02-19 19:38:05,700 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/commit-2-alt-dnh.wvr.bpl' [2021-02-19 19:38:05,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:38:05,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:38:05,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:38:05,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:38:05,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:38:05,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/1) ... [2021-02-19 19:38:05,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/1) ... [2021-02-19 19:38:05,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:38:05,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:38:05,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:38:05,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:38:05,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/1) ... [2021-02-19 19:38:05,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/1) ... [2021-02-19 19:38:05,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/1) ... [2021-02-19 19:38:05,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/1) ... [2021-02-19 19:38:05,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/1) ... [2021-02-19 19:38:05,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/1) ... [2021-02-19 19:38:05,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/1) ... [2021-02-19 19:38:05,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:38:05,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:38:05,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:38:05,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:38:05,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (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 [2021-02-19 19:38:05,868 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:38:05,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:38:05,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:38:05,873 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:38:05,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:38:05,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:38:05,873 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:38:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:38:05,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:38:05,874 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 19:38:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 19:38:05,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 19:38:05,875 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 19:38:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 19:38:05,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 19:38:05,876 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:38:06,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:38:06,260 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-19 19:38:06,261 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-02-19 19:38:06,261 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-02-19 19:38:06,261 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-02-19 19:38:06,262 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-02-19 19:38:06,263 INFO L202 PluginConnector]: Adding new model commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:38:06 BoogieIcfgContainer [2021-02-19 19:38:06,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:38:06,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:38:06,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:38:06,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:38:06,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:38:05" (1/2) ... [2021-02-19 19:38:06,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b00050 and model type commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:38:06, skipping insertion in model container [2021-02-19 19:38:06,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:38:06" (2/2) ... [2021-02-19 19:38:06,269 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2-alt-dnh.wvr.bpl [2021-02-19 19:38:06,285 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:38:06,286 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:38:06,289 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:38:06,290 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:38:06,374 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 19:38:06,390 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 19:38:06,415 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:38:06,415 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:38:06,415 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:38:06,415 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:38:06,415 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:38:06,415 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:38:06,416 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:38:06,416 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:38:06,431 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-02-19 19:38:06,476 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 326 states, 324 states have (on average 3.8055555555555554) internal successors, (1233), 325 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 326 states, 324 states have (on average 3.8055555555555554) internal successors, (1233), 325 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 19:38:06,499 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:06,500 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:06,500 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash 513789453, now seen corresponding path program 1 times [2021-02-19 19:38:06,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:06,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408626428] [2021-02-19 19:38:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:06,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408626428] [2021-02-19 19:38:06,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:38:06,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:38:06,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818026340] [2021-02-19 19:38:06,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:38:06,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:06,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:38:06,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:06,644 INFO L87 Difference]: Start difference. First operand has 326 states, 324 states have (on average 3.8055555555555554) internal successors, (1233), 325 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:06,723 INFO L93 Difference]: Finished difference Result 384 states and 1448 transitions. [2021-02-19 19:38:06,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:38:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 19:38:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:06,744 INFO L225 Difference]: With dead ends: 384 [2021-02-19 19:38:06,745 INFO L226 Difference]: Without dead ends: 379 [2021-02-19 19:38:06,746 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-02-19 19:38:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 364. [2021-02-19 19:38:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.796143250688705) internal successors, (1378), 363 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1378 transitions. [2021-02-19 19:38:06,799 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1378 transitions. Word has length 15 [2021-02-19 19:38:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:06,800 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 1378 transitions. [2021-02-19 19:38:06,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,800 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1378 transitions. [2021-02-19 19:38:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 19:38:06,802 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:06,802 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:06,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:38:06,803 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:06,803 INFO L82 PathProgramCache]: Analyzing trace with hash -151279026, now seen corresponding path program 1 times [2021-02-19 19:38:06,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:06,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635605312] [2021-02-19 19:38:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:06,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635605312] [2021-02-19 19:38:06,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:38:06,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:38:06,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109945842] [2021-02-19 19:38:06,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:38:06,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:06,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:38:06,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:06,842 INFO L87 Difference]: Start difference. First operand 364 states and 1378 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:06,870 INFO L93 Difference]: Finished difference Result 684 states and 2527 transitions. [2021-02-19 19:38:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:38:06,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 19:38:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:06,876 INFO L225 Difference]: With dead ends: 684 [2021-02-19 19:38:06,877 INFO L226 Difference]: Without dead ends: 657 [2021-02-19 19:38:06,878 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-02-19 19:38:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 578. [2021-02-19 19:38:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 3.802426343154246) internal successors, (2194), 577 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 2194 transitions. [2021-02-19 19:38:06,908 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 2194 transitions. Word has length 17 [2021-02-19 19:38:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:06,909 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 2194 transitions. [2021-02-19 19:38:06,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 2194 transitions. [2021-02-19 19:38:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 19:38:06,911 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:06,911 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:06,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 19:38:06,912 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash 356354380, now seen corresponding path program 1 times [2021-02-19 19:38:06,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:06,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316961871] [2021-02-19 19:38:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:06,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316961871] [2021-02-19 19:38:06,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:38:06,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:38:06,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133576887] [2021-02-19 19:38:06,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:38:06,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:38:06,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:06,946 INFO L87 Difference]: Start difference. First operand 578 states and 2194 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:06,969 INFO L93 Difference]: Finished difference Result 577 states and 2074 transitions. [2021-02-19 19:38:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:38:06,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 19:38:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:06,973 INFO L225 Difference]: With dead ends: 577 [2021-02-19 19:38:06,974 INFO L226 Difference]: Without dead ends: 569 [2021-02-19 19:38:06,974 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-02-19 19:38:06,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 549. [2021-02-19 19:38:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 3.6861313868613137) internal successors, (2020), 548 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 2020 transitions. [2021-02-19 19:38:06,994 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 2020 transitions. Word has length 17 [2021-02-19 19:38:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:06,994 INFO L480 AbstractCegarLoop]: Abstraction has 549 states and 2020 transitions. [2021-02-19 19:38:06,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:06,995 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 2020 transitions. [2021-02-19 19:38:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 19:38:06,996 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:06,996 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:06,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 19:38:06,997 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1697864274, now seen corresponding path program 1 times [2021-02-19 19:38:06,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:06,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38848665] [2021-02-19 19:38:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:07,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38848665] [2021-02-19 19:38:07,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:38:07,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:38:07,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952644732] [2021-02-19 19:38:07,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:38:07,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:07,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:38:07,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:07,032 INFO L87 Difference]: Start difference. First operand 549 states and 2020 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:07,041 INFO L93 Difference]: Finished difference Result 492 states and 1798 transitions. [2021-02-19 19:38:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:38:07,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 19:38:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:07,045 INFO L225 Difference]: With dead ends: 492 [2021-02-19 19:38:07,045 INFO L226 Difference]: Without dead ends: 480 [2021-02-19 19:38:07,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-02-19 19:38:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 479. [2021-02-19 19:38:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.707112970711297) internal successors, (1772), 478 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1772 transitions. [2021-02-19 19:38:07,062 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1772 transitions. Word has length 17 [2021-02-19 19:38:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:07,063 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1772 transitions. [2021-02-19 19:38:07,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1772 transitions. [2021-02-19 19:38:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:38:07,064 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:07,065 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:07,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 19:38:07,065 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1957658294, now seen corresponding path program 1 times [2021-02-19 19:38:07,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:07,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528538019] [2021-02-19 19:38:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:07,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528538019] [2021-02-19 19:38:07,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:38:07,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:38:07,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141439036] [2021-02-19 19:38:07,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:38:07,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:07,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:38:07,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:07,088 INFO L87 Difference]: Start difference. First operand 479 states and 1772 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:07,100 INFO L93 Difference]: Finished difference Result 289 states and 1042 transitions. [2021-02-19 19:38:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:38:07,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 19:38:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:07,103 INFO L225 Difference]: With dead ends: 289 [2021-02-19 19:38:07,103 INFO L226 Difference]: Without dead ends: 285 [2021-02-19 19:38:07,104 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:38:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-02-19 19:38:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-02-19 19:38:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.640845070422535) internal successors, (1034), 284 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 1034 transitions. [2021-02-19 19:38:07,114 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 1034 transitions. Word has length 21 [2021-02-19 19:38:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:07,114 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 1034 transitions. [2021-02-19 19:38:07,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 1034 transitions. [2021-02-19 19:38:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:38:07,116 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:07,116 INFO L506 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] [2021-02-19 19:38:07,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 19:38:07,117 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2105484369, now seen corresponding path program 1 times [2021-02-19 19:38:07,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:07,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320580001] [2021-02-19 19:38:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320580001] [2021-02-19 19:38:07,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:38:07,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:38:07,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218250773] [2021-02-19 19:38:07,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:38:07,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:07,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:38:07,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:38:07,201 INFO L87 Difference]: Start difference. First operand 285 states and 1034 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:07,264 INFO L93 Difference]: Finished difference Result 813 states and 2927 transitions. [2021-02-19 19:38:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:38:07,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:38:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:07,270 INFO L225 Difference]: With dead ends: 813 [2021-02-19 19:38:07,270 INFO L226 Difference]: Without dead ends: 797 [2021-02-19 19:38:07,271 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:38:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-02-19 19:38:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 657. [2021-02-19 19:38:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.6935975609756095) internal successors, (2423), 656 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2423 transitions. [2021-02-19 19:38:07,292 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2423 transitions. Word has length 23 [2021-02-19 19:38:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:07,292 INFO L480 AbstractCegarLoop]: Abstraction has 657 states and 2423 transitions. [2021-02-19 19:38:07,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2423 transitions. [2021-02-19 19:38:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:07,296 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:07,299 INFO L506 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, 1] [2021-02-19 19:38:07,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 19:38:07,299 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1519607673, now seen corresponding path program 1 times [2021-02-19 19:38:07,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:07,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449624793] [2021-02-19 19:38:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:07,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449624793] [2021-02-19 19:38:07,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:38:07,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:38:07,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247959418] [2021-02-19 19:38:07,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:38:07,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:07,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:38:07,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:38:07,379 INFO L87 Difference]: Start difference. First operand 657 states and 2423 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:07,411 INFO L93 Difference]: Finished difference Result 1778 states and 6587 transitions. [2021-02-19 19:38:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:38:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:07,423 INFO L225 Difference]: With dead ends: 1778 [2021-02-19 19:38:07,423 INFO L226 Difference]: Without dead ends: 1762 [2021-02-19 19:38:07,424 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:38:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-02-19 19:38:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1386. [2021-02-19 19:38:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.9509025270758125) internal successors, (5472), 1385 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 5472 transitions. [2021-02-19 19:38:07,480 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 5472 transitions. Word has length 27 [2021-02-19 19:38:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:07,481 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 5472 transitions. [2021-02-19 19:38:07,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 5472 transitions. [2021-02-19 19:38:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:07,484 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:07,484 INFO L506 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, 1] [2021-02-19 19:38:07,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 19:38:07,484 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1657063957, now seen corresponding path program 1 times [2021-02-19 19:38:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:07,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907628525] [2021-02-19 19:38:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:07,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907628525] [2021-02-19 19:38:07,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:38:07,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:38:07,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317872563] [2021-02-19 19:38:07,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:38:07,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:07,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:38:07,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:38:07,552 INFO L87 Difference]: Start difference. First operand 1386 states and 5472 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:07,599 INFO L93 Difference]: Finished difference Result 3763 states and 14865 transitions. [2021-02-19 19:38:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:38:07,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:07,624 INFO L225 Difference]: With dead ends: 3763 [2021-02-19 19:38:07,624 INFO L226 Difference]: Without dead ends: 3744 [2021-02-19 19:38:07,624 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:38:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3744 states. [2021-02-19 19:38:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3744 to 2926. [2021-02-19 19:38:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 4.193846153846154) internal successors, (12267), 2925 states have internal predecessors, (12267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 12267 transitions. [2021-02-19 19:38:07,737 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 12267 transitions. Word has length 27 [2021-02-19 19:38:07,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:07,737 INFO L480 AbstractCegarLoop]: Abstraction has 2926 states and 12267 transitions. [2021-02-19 19:38:07,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 12267 transitions. [2021-02-19 19:38:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:07,742 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:07,742 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:07,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 19:38:07,742 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1248868157, now seen corresponding path program 1 times [2021-02-19 19:38:07,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:07,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574270755] [2021-02-19 19:38:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:08,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574270755] [2021-02-19 19:38:08,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886776823] [2021-02-19 19:38:08,157 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 [2021-02-19 19:38:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 19:38:08,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:08,396 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 5 treesize of output 3 [2021-02-19 19:38:08,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:08,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:08,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:08,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:38:08,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:38:08,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:08,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:08,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:08,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-02-19 19:38:08,574 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:08,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:08,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:08,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:08,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:08,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2021-02-19 19:38:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:08,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:08,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-02-19 19:38:08,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985792972] [2021-02-19 19:38:08,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:38:08,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:08,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:38:08,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:38:08,601 INFO L87 Difference]: Start difference. First operand 2926 states and 12267 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:08,751 INFO L93 Difference]: Finished difference Result 3014 states and 12495 transitions. [2021-02-19 19:38:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:38:08,751 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:08,771 INFO L225 Difference]: With dead ends: 3014 [2021-02-19 19:38:08,772 INFO L226 Difference]: Without dead ends: 3002 [2021-02-19 19:38:08,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:38:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-02-19 19:38:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2976. [2021-02-19 19:38:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2975 states have (on average 4.167731092436974) internal successors, (12399), 2975 states have internal predecessors, (12399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 12399 transitions. [2021-02-19 19:38:08,933 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 12399 transitions. Word has length 27 [2021-02-19 19:38:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:08,935 INFO L480 AbstractCegarLoop]: Abstraction has 2976 states and 12399 transitions. [2021-02-19 19:38:08,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 12399 transitions. [2021-02-19 19:38:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:08,939 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:08,939 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:09,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-02-19 19:38:09,161 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1186060161, now seen corresponding path program 2 times [2021-02-19 19:38:09,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:09,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477413449] [2021-02-19 19:38:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:09,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477413449] [2021-02-19 19:38:09,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190288647] [2021-02-19 19:38:09,373 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 [2021-02-19 19:38:09,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:38:09,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:09,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 19:38:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:09,522 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 5 treesize of output 3 [2021-02-19 19:38:09,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:09,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:09,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:09,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:38:09,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:38:09,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:09,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:09,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:09,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-02-19 19:38:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:09,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:09,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:09,820 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 19 treesize of output 1 [2021-02-19 19:38:09,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:09,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:09,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:09,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:09,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-02-19 19:38:09,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:09,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:09,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:09,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:59, output treesize:5 [2021-02-19 19:38:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:09,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:09,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-02-19 19:38:09,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957913673] [2021-02-19 19:38:09,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:38:09,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:38:09,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:38:09,863 INFO L87 Difference]: Start difference. First operand 2976 states and 12399 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-02-19 19:38:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:10,069 INFO L93 Difference]: Finished difference Result 3052 states and 12589 transitions. [2021-02-19 19:38:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:38:10,069 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:10,087 INFO L225 Difference]: With dead ends: 3052 [2021-02-19 19:38:10,087 INFO L226 Difference]: Without dead ends: 3036 [2021-02-19 19:38:10,088 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:38:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-02-19 19:38:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2994. [2021-02-19 19:38:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2993 states have (on average 4.1570330771800865) internal successors, (12442), 2993 states have internal predecessors, (12442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 12442 transitions. [2021-02-19 19:38:10,195 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 12442 transitions. Word has length 27 [2021-02-19 19:38:10,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:10,196 INFO L480 AbstractCegarLoop]: Abstraction has 2994 states and 12442 transitions. [2021-02-19 19:38:10,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-02-19 19:38:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 12442 transitions. [2021-02-19 19:38:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:10,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:10,198 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:10,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 19:38:10,414 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:10,415 INFO L82 PathProgramCache]: Analyzing trace with hash -20810989, now seen corresponding path program 3 times [2021-02-19 19:38:10,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:10,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874274335] [2021-02-19 19:38:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:10,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874274335] [2021-02-19 19:38:10,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562208279] [2021-02-19 19:38:10,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:38:10,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:38:10,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:10,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 19:38:10,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:10,767 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 7 treesize of output 3 [2021-02-19 19:38:10,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:10,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:10,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:10,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-02-19 19:38:10,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:38:10,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:10,999 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-02-19 19:38:11,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:38:11,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:25 [2021-02-19 19:38:11,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:11,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:11,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 1 [2021-02-19 19:38:11,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:11,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:11,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:11,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 7 [2021-02-19 19:38:11,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:11,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:11,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:11,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:5 [2021-02-19 19:38:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:11,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:11,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-02-19 19:38:11,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750742482] [2021-02-19 19:38:11,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:38:11,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:11,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:38:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:38:11,215 INFO L87 Difference]: Start difference. First operand 2994 states and 12442 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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) [2021-02-19 19:38:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:11,591 INFO L93 Difference]: Finished difference Result 3093 states and 12677 transitions. [2021-02-19 19:38:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:38:11,592 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:11,609 INFO L225 Difference]: With dead ends: 3093 [2021-02-19 19:38:11,609 INFO L226 Difference]: Without dead ends: 3077 [2021-02-19 19:38:11,611 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:38:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-02-19 19:38:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2999. [2021-02-19 19:38:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 4.153435623749166) internal successors, (12452), 2998 states have internal predecessors, (12452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 12452 transitions. [2021-02-19 19:38:11,721 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 12452 transitions. Word has length 27 [2021-02-19 19:38:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:11,722 INFO L480 AbstractCegarLoop]: Abstraction has 2999 states and 12452 transitions. [2021-02-19 19:38:11,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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) [2021-02-19 19:38:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 12452 transitions. [2021-02-19 19:38:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:11,726 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:11,726 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:11,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 19:38:11,938 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash -694149631, now seen corresponding path program 4 times [2021-02-19 19:38:11,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:11,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869729314] [2021-02-19 19:38:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:12,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869729314] [2021-02-19 19:38:12,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433668077] [2021-02-19 19:38:12,095 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 [2021-02-19 19:38:12,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:38:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 19:38:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:12,217 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 5 treesize of output 3 [2021-02-19 19:38:12,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:12,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:12,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:12,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:38:12,297 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 9 treesize of output 7 [2021-02-19 19:38:12,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:12,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:12,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:12,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:22 [2021-02-19 19:38:12,362 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:12,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:12,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:12,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:12,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:12,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2021-02-19 19:38:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:12,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:12,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-02-19 19:38:12,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580102704] [2021-02-19 19:38:12,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:38:12,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:12,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:38:12,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:38:12,385 INFO L87 Difference]: Start difference. First operand 2999 states and 12452 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:12,594 INFO L93 Difference]: Finished difference Result 3097 states and 12699 transitions. [2021-02-19 19:38:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:38:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:12,608 INFO L225 Difference]: With dead ends: 3097 [2021-02-19 19:38:12,608 INFO L226 Difference]: Without dead ends: 3085 [2021-02-19 19:38:12,609 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:38:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2021-02-19 19:38:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 3001. [2021-02-19 19:38:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 3000 states have (on average 4.152333333333333) internal successors, (12457), 3000 states have internal predecessors, (12457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 12457 transitions. [2021-02-19 19:38:12,694 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 12457 transitions. Word has length 27 [2021-02-19 19:38:12,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:12,694 INFO L480 AbstractCegarLoop]: Abstraction has 3001 states and 12457 transitions. [2021-02-19 19:38:12,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 12457 transitions. [2021-02-19 19:38:12,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:12,698 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:12,698 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:12,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 19:38:12,906 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash -756957627, now seen corresponding path program 5 times [2021-02-19 19:38:12,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:12,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262163425] [2021-02-19 19:38:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:13,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262163425] [2021-02-19 19:38:13,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105538113] [2021-02-19 19:38:13,104 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 [2021-02-19 19:38:13,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:38:13,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:13,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 19:38:13,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:13,221 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 7 treesize of output 3 [2021-02-19 19:38:13,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:13,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:13,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:13,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-02-19 19:38:13,309 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 9 treesize of output 7 [2021-02-19 19:38:13,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:13,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:13,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:13,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:22 [2021-02-19 19:38:13,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:13,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:13,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:13,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-02-19 19:38:13,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:13,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:13,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:13,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2021-02-19 19:38:13,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:13,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:13,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:13,459 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:5 [2021-02-19 19:38:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:13,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:13,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-02-19 19:38:13,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553187149] [2021-02-19 19:38:13,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:38:13,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:38:13,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:38:13,484 INFO L87 Difference]: Start difference. First operand 3001 states and 12457 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-02-19 19:38:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:13,782 INFO L93 Difference]: Finished difference Result 3137 states and 12784 transitions. [2021-02-19 19:38:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:38:13,783 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:13,794 INFO L225 Difference]: With dead ends: 3137 [2021-02-19 19:38:13,794 INFO L226 Difference]: Without dead ends: 3121 [2021-02-19 19:38:13,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:38:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-02-19 19:38:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 3004. [2021-02-19 19:38:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 4.14985014985015) internal successors, (12462), 3003 states have internal predecessors, (12462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 12462 transitions. [2021-02-19 19:38:13,896 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 12462 transitions. Word has length 27 [2021-02-19 19:38:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:13,896 INFO L480 AbstractCegarLoop]: Abstraction has 3004 states and 12462 transitions. [2021-02-19 19:38:13,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-02-19 19:38:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 12462 transitions. [2021-02-19 19:38:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:13,899 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:13,899 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:14,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:14,113 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:14,113 INFO L82 PathProgramCache]: Analyzing trace with hash -743838531, now seen corresponding path program 6 times [2021-02-19 19:38:14,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:14,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849413499] [2021-02-19 19:38:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:14,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849413499] [2021-02-19 19:38:14,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825352082] [2021-02-19 19:38:14,290 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 [2021-02-19 19:38:14,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:38:14,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 19:38:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:14,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-02-19 19:38:14,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:14,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:14,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:14,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:38:14,462 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 9 treesize of output 7 [2021-02-19 19:38:14,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:14,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:14,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:14,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:11 [2021-02-19 19:38:14,530 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:14,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:14,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:14,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:14,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:14,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2021-02-19 19:38:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:14,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:14,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-02-19 19:38:14,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798368310] [2021-02-19 19:38:14,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:38:14,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:38:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:38:14,560 INFO L87 Difference]: Start difference. First operand 3004 states and 12462 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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) [2021-02-19 19:38:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:14,744 INFO L93 Difference]: Finished difference Result 3121 states and 12772 transitions. [2021-02-19 19:38:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:38:14,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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 27 [2021-02-19 19:38:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:14,756 INFO L225 Difference]: With dead ends: 3121 [2021-02-19 19:38:14,756 INFO L226 Difference]: Without dead ends: 3109 [2021-02-19 19:38:14,756 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:38:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-02-19 19:38:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 3002. [2021-02-19 19:38:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.150949683438854) internal successors, (12457), 3001 states have internal predecessors, (12457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12457 transitions. [2021-02-19 19:38:14,837 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12457 transitions. Word has length 27 [2021-02-19 19:38:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:14,837 INFO L480 AbstractCegarLoop]: Abstraction has 3002 states and 12457 transitions. [2021-02-19 19:38:14,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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) [2021-02-19 19:38:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12457 transitions. [2021-02-19 19:38:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:14,840 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:14,840 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:15,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:15,061 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:15,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1457152041, now seen corresponding path program 7 times [2021-02-19 19:38:15,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:15,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695742754] [2021-02-19 19:38:15,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:15,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695742754] [2021-02-19 19:38:15,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793379582] [2021-02-19 19:38:15,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:38:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:15,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 19:38:15,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:15,396 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 5 treesize of output 3 [2021-02-19 19:38:15,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:15,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:15,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:15,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-02-19 19:38:15,471 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 9 treesize of output 7 [2021-02-19 19:38:15,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:15,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:15,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:15,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:22 [2021-02-19 19:38:15,547 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:15,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:15,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:15,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:15,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:15,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2021-02-19 19:38:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:15,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:15,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-02-19 19:38:15,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926797286] [2021-02-19 19:38:15,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:38:15,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:38:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:38:15,572 INFO L87 Difference]: Start difference. First operand 3002 states and 12457 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:15,755 INFO L93 Difference]: Finished difference Result 3092 states and 12690 transitions. [2021-02-19 19:38:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:38:15,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:15,767 INFO L225 Difference]: With dead ends: 3092 [2021-02-19 19:38:15,767 INFO L226 Difference]: Without dead ends: 3080 [2021-02-19 19:38:15,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:38:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-02-19 19:38:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 3004. [2021-02-19 19:38:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 4.14985014985015) internal successors, (12462), 3003 states have internal predecessors, (12462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 12462 transitions. [2021-02-19 19:38:15,853 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 12462 transitions. Word has length 27 [2021-02-19 19:38:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:15,853 INFO L480 AbstractCegarLoop]: Abstraction has 3004 states and 12462 transitions. [2021-02-19 19:38:15,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 12462 transitions. [2021-02-19 19:38:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:15,856 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:15,856 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:16,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:16,070 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:16,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:16,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1519960037, now seen corresponding path program 8 times [2021-02-19 19:38:16,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:16,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756471501] [2021-02-19 19:38:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:16,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756471501] [2021-02-19 19:38:16,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090989177] [2021-02-19 19:38:16,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:16,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:38:16,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 19:38:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:16,421 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 5 treesize of output 3 [2021-02-19 19:38:16,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:16,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:16,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:16,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-02-19 19:38:16,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:38:16,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:16,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:16,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:16,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-02-19 19:38:16,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:16,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:16,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:16,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 7 [2021-02-19 19:38:16,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:16,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:16,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:16,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-02-19 19:38:16,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:16,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:16,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:16,605 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:59, output treesize:5 [2021-02-19 19:38:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:16,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:16,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-02-19 19:38:16,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959922859] [2021-02-19 19:38:16,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:38:16,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:16,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:38:16,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:38:16,624 INFO L87 Difference]: Start difference. First operand 3004 states and 12462 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-02-19 19:38:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:16,868 INFO L93 Difference]: Finished difference Result 3098 states and 12689 transitions. [2021-02-19 19:38:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:38:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:16,879 INFO L225 Difference]: With dead ends: 3098 [2021-02-19 19:38:16,879 INFO L226 Difference]: Without dead ends: 3082 [2021-02-19 19:38:16,880 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:38:16,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2021-02-19 19:38:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 3003. [2021-02-19 19:38:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 4.150899400399734) internal successors, (12461), 3002 states have internal predecessors, (12461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 12461 transitions. [2021-02-19 19:38:16,989 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 12461 transitions. Word has length 27 [2021-02-19 19:38:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:16,989 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 12461 transitions. [2021-02-19 19:38:16,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-02-19 19:38:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 12461 transitions. [2021-02-19 19:38:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:16,994 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:16,994 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:17,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 19:38:17,214 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:17,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1506840941, now seen corresponding path program 9 times [2021-02-19 19:38:17,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:17,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056195730] [2021-02-19 19:38:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:17,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056195730] [2021-02-19 19:38:17,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924809533] [2021-02-19 19:38:17,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:17,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:38:17,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:38:17,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:17,539 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 7 treesize of output 3 [2021-02-19 19:38:17,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:17,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:17,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:17,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-02-19 19:38:17,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:38:17,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:17,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:17,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:17,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:11 [2021-02-19 19:38:17,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:17,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:17,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:17,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 7 [2021-02-19 19:38:17,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:17,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:17,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:17,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-02-19 19:38:17,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:17,823 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-02-19 19:38:17,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:17,833 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:5 [2021-02-19 19:38:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:17,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:17,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-02-19 19:38:17,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988413967] [2021-02-19 19:38:17,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:38:17,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:17,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:38:17,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:38:17,853 INFO L87 Difference]: Start difference. First operand 3003 states and 12461 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-02-19 19:38:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:18,105 INFO L93 Difference]: Finished difference Result 3122 states and 12774 transitions. [2021-02-19 19:38:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:38:18,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:18,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:18,114 INFO L225 Difference]: With dead ends: 3122 [2021-02-19 19:38:18,115 INFO L226 Difference]: Without dead ends: 3110 [2021-02-19 19:38:18,115 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:38:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-02-19 19:38:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2997. [2021-02-19 19:38:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2996 states have (on average 4.154539385847797) internal successors, (12447), 2996 states have internal predecessors, (12447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 12447 transitions. [2021-02-19 19:38:18,194 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 12447 transitions. Word has length 27 [2021-02-19 19:38:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:18,194 INFO L480 AbstractCegarLoop]: Abstraction has 2997 states and 12447 transitions. [2021-02-19 19:38:18,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-02-19 19:38:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 12447 transitions. [2021-02-19 19:38:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:18,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:18,196 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:18,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 19:38:18,415 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash 31947501, now seen corresponding path program 10 times [2021-02-19 19:38:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:18,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362172736] [2021-02-19 19:38:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:18,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362172736] [2021-02-19 19:38:18,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409646872] [2021-02-19 19:38:18,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:18,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:38:18,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:18,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 19:38:18,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:18,703 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 7 treesize of output 3 [2021-02-19 19:38:18,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:18,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:18,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:18,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-02-19 19:38:18,736 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 9 treesize of output 7 [2021-02-19 19:38:18,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:18,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:18,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:18,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:11 [2021-02-19 19:38:18,848 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:18,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:18,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:18,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:18,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:18,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2021-02-19 19:38:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:18,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:18,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-02-19 19:38:18,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848977924] [2021-02-19 19:38:18,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:38:18,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:18,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:38:18,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:38:18,877 INFO L87 Difference]: Start difference. First operand 2997 states and 12447 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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) [2021-02-19 19:38:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:19,052 INFO L93 Difference]: Finished difference Result 3098 states and 12720 transitions. [2021-02-19 19:38:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:38:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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 27 [2021-02-19 19:38:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:19,063 INFO L225 Difference]: With dead ends: 3098 [2021-02-19 19:38:19,063 INFO L226 Difference]: Without dead ends: 3082 [2021-02-19 19:38:19,063 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:38:19,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2021-02-19 19:38:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 2992. [2021-02-19 19:38:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 4.158141089936476) internal successors, (12437), 2991 states have internal predecessors, (12437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 12437 transitions. [2021-02-19 19:38:19,136 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 12437 transitions. Word has length 27 [2021-02-19 19:38:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:19,136 INFO L480 AbstractCegarLoop]: Abstraction has 2992 states and 12437 transitions. [2021-02-19 19:38:19,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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) [2021-02-19 19:38:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 12437 transitions. [2021-02-19 19:38:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:19,139 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:19,139 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:19,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:19,357 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1386284679, now seen corresponding path program 11 times [2021-02-19 19:38:19,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:19,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869566221] [2021-02-19 19:38:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:19,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869566221] [2021-02-19 19:38:19,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792206764] [2021-02-19 19:38:19,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:19,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:38:19,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:19,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 19:38:19,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:19,639 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 5 treesize of output 3 [2021-02-19 19:38:19,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:19,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:19,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:19,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-02-19 19:38:19,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:38:19,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:19,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:19,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:19,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-02-19 19:38:19,767 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:19,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:19,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:19,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:19,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:19,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2021-02-19 19:38:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:19,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:19,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-02-19 19:38:19,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667917955] [2021-02-19 19:38:19,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:38:19,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:19,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:38:19,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:38:19,789 INFO L87 Difference]: Start difference. First operand 2992 states and 12437 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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) [2021-02-19 19:38:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:19,938 INFO L93 Difference]: Finished difference Result 3062 states and 12630 transitions. [2021-02-19 19:38:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:38:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:19,948 INFO L225 Difference]: With dead ends: 3062 [2021-02-19 19:38:19,948 INFO L226 Difference]: Without dead ends: 3050 [2021-02-19 19:38:19,948 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:38:19,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-02-19 19:38:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 2980. [2021-02-19 19:38:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 4.166834508224237) internal successors, (12413), 2979 states have internal predecessors, (12413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 12413 transitions. [2021-02-19 19:38:20,021 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 12413 transitions. Word has length 27 [2021-02-19 19:38:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:20,022 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 12413 transitions. [2021-02-19 19:38:20,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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) [2021-02-19 19:38:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 12413 transitions. [2021-02-19 19:38:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:38:20,024 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:20,024 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:20,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 19:38:20,238 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1976373127, now seen corresponding path program 12 times [2021-02-19 19:38:20,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:20,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787671061] [2021-02-19 19:38:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:20,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787671061] [2021-02-19 19:38:20,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307669964] [2021-02-19 19:38:20,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:20,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:38:20,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 19:38:20,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:20,561 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 5 treesize of output 3 [2021-02-19 19:38:20,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:20,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:20,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:20,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-02-19 19:38:20,618 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 9 treesize of output 7 [2021-02-19 19:38:20,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:20,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:20,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:20,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:22 [2021-02-19 19:38:20,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:20,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:20,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:20,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 7 [2021-02-19 19:38:20,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:20,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:20,745 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 21 treesize of output 1 [2021-02-19 19:38:20,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:20,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:20,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:20,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:5 [2021-02-19 19:38:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:20,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:20,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-02-19 19:38:20,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876166594] [2021-02-19 19:38:20,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:38:20,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:20,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:38:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:38:20,770 INFO L87 Difference]: Start difference. First operand 2980 states and 12413 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-02-19 19:38:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:20,965 INFO L93 Difference]: Finished difference Result 3096 states and 12702 transitions. [2021-02-19 19:38:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:38:20,965 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:38:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:20,975 INFO L225 Difference]: With dead ends: 3096 [2021-02-19 19:38:20,975 INFO L226 Difference]: Without dead ends: 3080 [2021-02-19 19:38:20,976 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:38:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-02-19 19:38:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 2968. [2021-02-19 19:38:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2968 states, 2967 states have (on average 4.175598247387934) internal successors, (12389), 2967 states have internal predecessors, (12389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2968 states to 2968 states and 12389 transitions. [2021-02-19 19:38:21,060 INFO L78 Accepts]: Start accepts. Automaton has 2968 states and 12389 transitions. Word has length 27 [2021-02-19 19:38:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:21,060 INFO L480 AbstractCegarLoop]: Abstraction has 2968 states and 12389 transitions. [2021-02-19 19:38:21,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-02-19 19:38:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2968 states and 12389 transitions. [2021-02-19 19:38:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:38:21,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:21,063 INFO L506 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, 1, 1, 1] [2021-02-19 19:38:21,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 19:38:21,289 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:21,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:21,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1861094590, now seen corresponding path program 13 times [2021-02-19 19:38:21,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:21,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787662111] [2021-02-19 19:38:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:38:21,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787662111] [2021-02-19 19:38:21,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086024615] [2021-02-19 19:38:21,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 19:38:21,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:21,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 19:38:21,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-02-19 19:38:21,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942038261] [2021-02-19 19:38:21,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:38:21,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:21,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:38:21,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:38:21,394 INFO L87 Difference]: Start difference. First operand 2968 states and 12389 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:21,420 INFO L93 Difference]: Finished difference Result 3772 states and 15322 transitions. [2021-02-19 19:38:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:38:21,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:38:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:21,432 INFO L225 Difference]: With dead ends: 3772 [2021-02-19 19:38:21,432 INFO L226 Difference]: Without dead ends: 3605 [2021-02-19 19:38:21,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:38:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-02-19 19:38:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2799. [2021-02-19 19:38:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2798 states have (on average 4.3216583273766975) internal successors, (12092), 2798 states have internal predecessors, (12092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 12092 transitions. [2021-02-19 19:38:21,514 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 12092 transitions. Word has length 29 [2021-02-19 19:38:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:21,514 INFO L480 AbstractCegarLoop]: Abstraction has 2799 states and 12092 transitions. [2021-02-19 19:38:21,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 12092 transitions. [2021-02-19 19:38:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:38:21,520 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:21,520 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:21,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 19:38:21,738 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:21,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1495953786, now seen corresponding path program 14 times [2021-02-19 19:38:21,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:21,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796949683] [2021-02-19 19:38:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:21,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796949683] [2021-02-19 19:38:21,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253256022] [2021-02-19 19:38:21,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:21,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:38:21,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:38:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:38:21,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:21,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 7 [2021-02-19 19:38:21,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704999903] [2021-02-19 19:38:21,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:38:21,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:38:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:38:21,892 INFO L87 Difference]: Start difference. First operand 2799 states and 12092 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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) [2021-02-19 19:38:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:21,910 INFO L93 Difference]: Finished difference Result 211 states and 430 transitions. [2021-02-19 19:38:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:38:21,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 33 [2021-02-19 19:38:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:21,911 INFO L225 Difference]: With dead ends: 211 [2021-02-19 19:38:21,911 INFO L226 Difference]: Without dead ends: 164 [2021-02-19 19:38:21,911 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:38:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-02-19 19:38:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 114. [2021-02-19 19:38:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.920353982300885) internal successors, (217), 113 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 217 transitions. [2021-02-19 19:38:21,913 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 217 transitions. Word has length 33 [2021-02-19 19:38:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:21,913 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 217 transitions. [2021-02-19 19:38:21,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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) [2021-02-19 19:38:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 217 transitions. [2021-02-19 19:38:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:21,914 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:21,914 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:22,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:22,130 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1969471621, now seen corresponding path program 15 times [2021-02-19 19:38:22,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:22,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522178250] [2021-02-19 19:38:22,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:22,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522178250] [2021-02-19 19:38:22,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996587916] [2021-02-19 19:38:22,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:22,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:38:22,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:22,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 81 conjunts are in the unsatisfiable core [2021-02-19 19:38:22,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:23,560 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:23,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:23,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:23,601 INFO L628 ElimStorePlain]: treesize reduction 5, result has 92.6 percent of original size [2021-02-19 19:38:23,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:38:23,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:63 [2021-02-19 19:38:23,813 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:23,814 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 17 treesize of output 11 [2021-02-19 19:38:23,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:23,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:23,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:38:23,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:71, output treesize:55 [2021-02-19 19:38:24,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:24,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:24,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-02-19 19:38:24,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:24,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:24,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:24,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 1 [2021-02-19 19:38:24,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:24,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:24,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:24,203 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:137, output treesize:12 [2021-02-19 19:38:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:24,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:24,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:24,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355528782] [2021-02-19 19:38:24,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:24,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:24,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:24,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:24,352 INFO L87 Difference]: Start difference. First operand 114 states and 217 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:26,485 INFO L93 Difference]: Finished difference Result 277 states and 553 transitions. [2021-02-19 19:38:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:38:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:38:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:26,486 INFO L225 Difference]: With dead ends: 277 [2021-02-19 19:38:26,486 INFO L226 Difference]: Without dead ends: 165 [2021-02-19 19:38:26,487 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=481, Invalid=3551, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 19:38:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-19 19:38:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2021-02-19 19:38:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.8604651162790697) internal successors, (240), 129 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 240 transitions. [2021-02-19 19:38:26,489 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 240 transitions. Word has length 39 [2021-02-19 19:38:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:26,489 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 240 transitions. [2021-02-19 19:38:26,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 240 transitions. [2021-02-19 19:38:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:26,489 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:26,489 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:26,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:26,690 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1055816529, now seen corresponding path program 16 times [2021-02-19 19:38:26,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:26,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170914083] [2021-02-19 19:38:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:27,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170914083] [2021-02-19 19:38:27,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321192207] [2021-02-19 19:38:27,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:27,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:38:27,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:27,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:38:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:28,038 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:28,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:28,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:28,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:28,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:28,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:38:28,298 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:28,298 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 32 treesize of output 18 [2021-02-19 19:38:28,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:28,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:28,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:28,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:50 [2021-02-19 19:38:28,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:28,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:28,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:38:28,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:28,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:28,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:38:28,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:28,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:28,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:28,535 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:38:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:28,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:28,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:28,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296255738] [2021-02-19 19:38:28,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:28,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:28,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:28,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:28,621 INFO L87 Difference]: Start difference. First operand 130 states and 240 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:29,965 INFO L93 Difference]: Finished difference Result 262 states and 485 transitions. [2021-02-19 19:38:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 19:38:29,966 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:38:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:29,966 INFO L225 Difference]: With dead ends: 262 [2021-02-19 19:38:29,966 INFO L226 Difference]: Without dead ends: 201 [2021-02-19 19:38:29,967 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=471, Invalid=3435, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:38:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-02-19 19:38:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 129. [2021-02-19 19:38:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.8671875) internal successors, (239), 128 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 239 transitions. [2021-02-19 19:38:29,970 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 239 transitions. Word has length 39 [2021-02-19 19:38:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:29,970 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 239 transitions. [2021-02-19 19:38:29,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 239 transitions. [2021-02-19 19:38:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:29,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:29,970 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:30,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:30,184 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash 382477887, now seen corresponding path program 17 times [2021-02-19 19:38:30,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:30,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130864102] [2021-02-19 19:38:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:30,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130864102] [2021-02-19 19:38:30,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812805618] [2021-02-19 19:38:30,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:30,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:38:30,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:30,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 79 conjunts are in the unsatisfiable core [2021-02-19 19:38:30,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:31,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:31,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:31,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 7 [2021-02-19 19:38:31,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:31,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:31,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:31,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:31,630 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 19 treesize of output 1 [2021-02-19 19:38:31,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:31,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:31,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:31,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:165, output treesize:56 [2021-02-19 19:38:31,825 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:31,825 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 15 [2021-02-19 19:38:31,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:31,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:31,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:31,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:38:32,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:32,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:32,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:38:32,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:32,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:38:32,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:32,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:32,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:32,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:38:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:32,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:32,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:32,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038415150] [2021-02-19 19:38:32,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:32,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:32,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:32,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:32,217 INFO L87 Difference]: Start difference. First operand 129 states and 239 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:33,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:33,850 INFO L93 Difference]: Finished difference Result 265 states and 496 transitions. [2021-02-19 19:38:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:38:33,850 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:38:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:33,851 INFO L225 Difference]: With dead ends: 265 [2021-02-19 19:38:33,851 INFO L226 Difference]: Without dead ends: 206 [2021-02-19 19:38:33,852 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:38:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-02-19 19:38:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 131. [2021-02-19 19:38:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.8692307692307693) internal successors, (243), 130 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 243 transitions. [2021-02-19 19:38:33,854 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 243 transitions. Word has length 39 [2021-02-19 19:38:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:33,854 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 243 transitions. [2021-02-19 19:38:33,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 243 transitions. [2021-02-19 19:38:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:33,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:33,854 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:34,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:34,055 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash 319669891, now seen corresponding path program 18 times [2021-02-19 19:38:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:34,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915928135] [2021-02-19 19:38:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:34,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915928135] [2021-02-19 19:38:34,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148920922] [2021-02-19 19:38:34,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:34,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:38:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:34,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 82 conjunts are in the unsatisfiable core [2021-02-19 19:38:34,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:35,363 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:35,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:35,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:35,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:35,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:35,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:38:35,564 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:35,564 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 15 [2021-02-19 19:38:35,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:35,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:35,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:35,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:38:35,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:35,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:35,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 1 [2021-02-19 19:38:35,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:35,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:35,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:35,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:38:35,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:35,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:35,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:35,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:135, output treesize:12 [2021-02-19 19:38:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:35,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:35,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:35,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940860052] [2021-02-19 19:38:35,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:35,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:35,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:35,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:35,950 INFO L87 Difference]: Start difference. First operand 131 states and 243 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:37,694 INFO L93 Difference]: Finished difference Result 269 states and 492 transitions. [2021-02-19 19:38:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 19:38:37,694 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:38:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:37,695 INFO L225 Difference]: With dead ends: 269 [2021-02-19 19:38:37,695 INFO L226 Difference]: Without dead ends: 209 [2021-02-19 19:38:37,695 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=519, Invalid=3771, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 19:38:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-02-19 19:38:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 132. [2021-02-19 19:38:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.8702290076335877) internal successors, (245), 131 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 245 transitions. [2021-02-19 19:38:37,697 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 245 transitions. Word has length 39 [2021-02-19 19:38:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:37,697 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 245 transitions. [2021-02-19 19:38:37,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 245 transitions. [2021-02-19 19:38:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:37,698 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:37,698 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:37,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 19:38:37,914 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash 332788987, now seen corresponding path program 19 times [2021-02-19 19:38:37,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:37,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973944576] [2021-02-19 19:38:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:38,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973944576] [2021-02-19 19:38:38,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276485642] [2021-02-19 19:38:38,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:38,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 80 conjunts are in the unsatisfiable core [2021-02-19 19:38:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:39,177 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:39,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:39,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:39,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:39,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:39,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:38:39,306 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:39,306 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 15 [2021-02-19 19:38:39,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:39,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:39,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:39,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:43 [2021-02-19 19:38:39,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:39,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 1 [2021-02-19 19:38:39,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:39,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:38:39,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:39,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:39,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:39,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:135, output treesize:12 [2021-02-19 19:38:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:39,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:39,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:39,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266204568] [2021-02-19 19:38:39,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:39,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:39,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:39,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:39,717 INFO L87 Difference]: Start difference. First operand 132 states and 245 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:41,076 INFO L93 Difference]: Finished difference Result 264 states and 485 transitions. [2021-02-19 19:38:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:38:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:38:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:41,077 INFO L225 Difference]: With dead ends: 264 [2021-02-19 19:38:41,077 INFO L226 Difference]: Without dead ends: 201 [2021-02-19 19:38:41,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=498, Invalid=3534, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 19:38:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-02-19 19:38:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2021-02-19 19:38:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.8629032258064515) internal successors, (231), 124 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 231 transitions. [2021-02-19 19:38:41,080 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 231 transitions. Word has length 39 [2021-02-19 19:38:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:41,080 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 231 transitions. [2021-02-19 19:38:41,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 231 transitions. [2021-02-19 19:38:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:41,081 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:41,081 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:41,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:41,281 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:41,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:41,282 INFO L82 PathProgramCache]: Analyzing trace with hash -380524523, now seen corresponding path program 20 times [2021-02-19 19:38:41,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:41,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095949525] [2021-02-19 19:38:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:41,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095949525] [2021-02-19 19:38:41,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097727851] [2021-02-19 19:38:41,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:41,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:38:41,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:41,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 80 conjunts are in the unsatisfiable core [2021-02-19 19:38:41,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:42,656 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:42,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:42,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:42,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:42,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:42,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:38:42,787 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:42,787 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 15 [2021-02-19 19:38:42,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:42,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:42,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:42,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:38:43,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:43,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:38:43,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:43,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:43,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:43,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 1 [2021-02-19 19:38:43,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:43,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:43,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:43,084 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:135, output treesize:12 [2021-02-19 19:38:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:43,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:43,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:43,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382080181] [2021-02-19 19:38:43,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:43,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:43,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:43,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:43,166 INFO L87 Difference]: Start difference. First operand 125 states and 231 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:44,707 INFO L93 Difference]: Finished difference Result 280 states and 521 transitions. [2021-02-19 19:38:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 19:38:44,707 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:38:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:44,708 INFO L225 Difference]: With dead ends: 280 [2021-02-19 19:38:44,708 INFO L226 Difference]: Without dead ends: 221 [2021-02-19 19:38:44,709 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=475, Invalid=3685, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:38:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-02-19 19:38:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 131. [2021-02-19 19:38:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.876923076923077) internal successors, (244), 130 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 244 transitions. [2021-02-19 19:38:44,711 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 244 transitions. Word has length 39 [2021-02-19 19:38:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:44,711 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 244 transitions. [2021-02-19 19:38:44,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 244 transitions. [2021-02-19 19:38:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:44,711 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:44,711 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:44,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 19:38:44,912 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash -443332519, now seen corresponding path program 21 times [2021-02-19 19:38:44,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:44,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511638439] [2021-02-19 19:38:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:45,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511638439] [2021-02-19 19:38:45,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606362725] [2021-02-19 19:38:45,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:45,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:38:45,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:45,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 80 conjunts are in the unsatisfiable core [2021-02-19 19:38:45,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:46,294 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:46,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:46,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:46,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:46,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:46,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:38:46,440 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:46,441 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 15 [2021-02-19 19:38:46,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:46,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:46,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:46,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:38:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:46,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:38:46,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:46,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:46,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:46,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:38:46,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:46,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:46,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:46,770 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:38:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:46,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:46,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:46,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987100806] [2021-02-19 19:38:46,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:46,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:46,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:46,895 INFO L87 Difference]: Start difference. First operand 131 states and 244 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:49,615 INFO L93 Difference]: Finished difference Result 281 states and 514 transitions. [2021-02-19 19:38:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 19:38:49,616 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:38:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:49,616 INFO L225 Difference]: With dead ends: 281 [2021-02-19 19:38:49,616 INFO L226 Difference]: Without dead ends: 219 [2021-02-19 19:38:49,617 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=649, Invalid=5357, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 19:38:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-02-19 19:38:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 132. [2021-02-19 19:38:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.8702290076335877) internal successors, (245), 131 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 245 transitions. [2021-02-19 19:38:49,620 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 245 transitions. Word has length 39 [2021-02-19 19:38:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:49,620 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 245 transitions. [2021-02-19 19:38:49,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 245 transitions. [2021-02-19 19:38:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:49,620 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:49,620 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:49,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 19:38:49,824 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash -430213423, now seen corresponding path program 22 times [2021-02-19 19:38:49,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:49,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084568642] [2021-02-19 19:38:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:50,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084568642] [2021-02-19 19:38:50,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837805309] [2021-02-19 19:38:50,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:50,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:38:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:50,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 80 conjunts are in the unsatisfiable core [2021-02-19 19:38:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:51,185 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:51,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:51,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:51,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:51,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:51,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:38:51,263 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:51,263 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 15 [2021-02-19 19:38:51,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:51,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:51,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:51,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:43 [2021-02-19 19:38:51,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:51,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:51,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:38:51,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:51,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:51,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 1 [2021-02-19 19:38:51,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:51,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:51,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:51,609 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:135, output treesize:12 [2021-02-19 19:38:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:51,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:51,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:51,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030066518] [2021-02-19 19:38:51,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:51,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:51,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:51,692 INFO L87 Difference]: Start difference. First operand 132 states and 245 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:53,192 INFO L93 Difference]: Finished difference Result 274 states and 501 transitions. [2021-02-19 19:38:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 19:38:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:38:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:53,193 INFO L225 Difference]: With dead ends: 274 [2021-02-19 19:38:53,193 INFO L226 Difference]: Without dead ends: 211 [2021-02-19 19:38:53,194 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:38:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-02-19 19:38:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 126. [2021-02-19 19:38:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.864) internal successors, (233), 125 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 233 transitions. [2021-02-19 19:38:53,196 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 233 transitions. Word has length 39 [2021-02-19 19:38:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:53,196 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 233 transitions. [2021-02-19 19:38:53,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 233 transitions. [2021-02-19 19:38:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:53,197 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:53,197 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:53,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:53,403 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:53,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1108575019, now seen corresponding path program 23 times [2021-02-19 19:38:53,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:53,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744764513] [2021-02-19 19:38:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:53,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744764513] [2021-02-19 19:38:53,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440173477] [2021-02-19 19:38:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:38:54,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:38:54,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:54,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:38:54,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:54,919 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:54,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:54,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:54,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:54,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:38:54,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:66 [2021-02-19 19:38:55,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:55,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:55,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2021-02-19 19:38:55,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:55,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 15 [2021-02-19 19:38:55,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:55,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:55,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:55,074 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:163, output treesize:43 [2021-02-19 19:38:55,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:55,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:55,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:38:55,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:55,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:55,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:55,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:38:55,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:55,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:55,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:55,419 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:38:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:55,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:55,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:55,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934211632] [2021-02-19 19:38:55,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:55,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:55,513 INFO L87 Difference]: Start difference. First operand 126 states and 233 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:38:57,364 INFO L93 Difference]: Finished difference Result 266 states and 499 transitions. [2021-02-19 19:38:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 19:38:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:38:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:38:57,365 INFO L225 Difference]: With dead ends: 266 [2021-02-19 19:38:57,365 INFO L226 Difference]: Without dead ends: 195 [2021-02-19 19:38:57,366 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=516, Invalid=3774, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 19:38:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-02-19 19:38:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 127. [2021-02-19 19:38:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.8650793650793651) internal successors, (235), 126 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 235 transitions. [2021-02-19 19:38:57,368 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 235 transitions. Word has length 39 [2021-02-19 19:38:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:38:57,368 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 235 transitions. [2021-02-19 19:38:57,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:38:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 235 transitions. [2021-02-19 19:38:57,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:38:57,368 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:38:57,368 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:38:57,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 19:38:57,578 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:38:57,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:38:57,578 INFO L82 PathProgramCache]: Analyzing trace with hash -309657161, now seen corresponding path program 24 times [2021-02-19 19:38:57,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:38:57,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244842476] [2021-02-19 19:38:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:38:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:38:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:38:58,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244842476] [2021-02-19 19:38:58,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836291814] [2021-02-19 19:38:58,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:38:58,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:38:58,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:38:58,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 81 conjunts are in the unsatisfiable core [2021-02-19 19:38:58,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:38:59,007 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:38:59,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:38:59,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:59,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:59,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:59,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:38:59,160 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:38:59,161 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 34 treesize of output 18 [2021-02-19 19:38:59,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:59,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:59,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:59,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:54 [2021-02-19 19:38:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:59,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:59,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:38:59,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:59,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:38:59,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:38:59,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:38:59,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:38:59,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:38:59,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:38:59,548 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:38:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:38:59,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:38:59,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:38:59,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100845210] [2021-02-19 19:38:59,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:38:59,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:38:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:38:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:38:59,717 INFO L87 Difference]: Start difference. First operand 127 states and 235 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:05,164 INFO L93 Difference]: Finished difference Result 329 states and 606 transitions. [2021-02-19 19:39:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-02-19 19:39:05,165 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:05,165 INFO L225 Difference]: With dead ends: 329 [2021-02-19 19:39:05,165 INFO L226 Difference]: Without dead ends: 255 [2021-02-19 19:39:05,166 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1087, Invalid=10469, Unknown=0, NotChecked=0, Total=11556 [2021-02-19 19:39:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-02-19 19:39:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 131. [2021-02-19 19:39:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.876923076923077) internal successors, (244), 130 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 244 transitions. [2021-02-19 19:39:05,168 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 244 transitions. Word has length 39 [2021-02-19 19:39:05,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:05,168 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 244 transitions. [2021-02-19 19:39:05,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 244 transitions. [2021-02-19 19:39:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:05,168 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:05,169 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:05,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:05,369 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash -899745609, now seen corresponding path program 25 times [2021-02-19 19:39:05,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:05,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214548536] [2021-02-19 19:39:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:05,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214548536] [2021-02-19 19:39:05,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29598746] [2021-02-19 19:39:05,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:05,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:39:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:06,607 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:06,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:39:06,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:06,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:06,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:06,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:39:06,723 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:06,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-02-19 19:39:06,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:06,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:06,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:06,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:54 [2021-02-19 19:39:06,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:06,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:06,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:39:06,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:06,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:06,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:06,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:39:06,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:06,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:06,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:06,975 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:39:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:07,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:07,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:39:07,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605596720] [2021-02-19 19:39:07,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:39:07,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:07,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:39:07,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:39:07,056 INFO L87 Difference]: Start difference. First operand 131 states and 244 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:08,749 INFO L93 Difference]: Finished difference Result 254 states and 463 transitions. [2021-02-19 19:39:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 19:39:08,750 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:08,750 INFO L225 Difference]: With dead ends: 254 [2021-02-19 19:39:08,750 INFO L226 Difference]: Without dead ends: 193 [2021-02-19 19:39:08,750 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=519, Invalid=3903, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 19:39:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-02-19 19:39:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 121. [2021-02-19 19:39:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.8833333333333333) internal successors, (226), 120 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 226 transitions. [2021-02-19 19:39:08,752 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 226 transitions. Word has length 39 [2021-02-19 19:39:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:08,752 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 226 transitions. [2021-02-19 19:39:08,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 226 transitions. [2021-02-19 19:39:08,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:08,752 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:08,752 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:08,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-02-19 19:39:08,968 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:08,968 INFO L82 PathProgramCache]: Analyzing trace with hash -899771367, now seen corresponding path program 26 times [2021-02-19 19:39:08,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:08,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363298962] [2021-02-19 19:39:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:09,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363298962] [2021-02-19 19:39:09,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390735449] [2021-02-19 19:39:09,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:09,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:39:09,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:39:09,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 80 conjunts are in the unsatisfiable core [2021-02-19 19:39:09,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:10,250 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:10,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:39:10,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:10,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:10,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:10,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:39:10,422 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:10,423 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 15 [2021-02-19 19:39:10,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:10,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:10,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:10,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:39:10,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:10,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:10,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:39:10,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:10,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 1 [2021-02-19 19:39:10,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:10,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:10,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:10,701 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:135, output treesize:12 [2021-02-19 19:39:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:10,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:10,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:39:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485556200] [2021-02-19 19:39:10,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:39:10,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:39:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:39:10,784 INFO L87 Difference]: Start difference. First operand 121 states and 226 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:12,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:12,640 INFO L93 Difference]: Finished difference Result 414 states and 784 transitions. [2021-02-19 19:39:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 19:39:12,642 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:12,642 INFO L225 Difference]: With dead ends: 414 [2021-02-19 19:39:12,642 INFO L226 Difference]: Without dead ends: 241 [2021-02-19 19:39:12,643 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=455, Invalid=3451, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:39:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-02-19 19:39:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2021-02-19 19:39:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.7852348993288591) internal successors, (266), 149 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 266 transitions. [2021-02-19 19:39:12,645 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 266 transitions. Word has length 39 [2021-02-19 19:39:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:12,645 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 266 transitions. [2021-02-19 19:39:12,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 266 transitions. [2021-02-19 19:39:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:12,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:12,645 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:12,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:12,861 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:12,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:12,861 INFO L82 PathProgramCache]: Analyzing trace with hash 689175731, now seen corresponding path program 27 times [2021-02-19 19:39:12,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:12,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180640030] [2021-02-19 19:39:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:13,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180640030] [2021-02-19 19:39:13,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896163283] [2021-02-19 19:39:13,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:13,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:39:13,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:39:13,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 81 conjunts are in the unsatisfiable core [2021-02-19 19:39:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:14,170 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:14,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:39:14,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:14,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:14,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:14,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:39:14,309 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:14,309 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 32 treesize of output 18 [2021-02-19 19:39:14,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:14,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:14,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:14,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:39:14,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:14,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:39:14,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:14,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:14,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:14,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:39:14,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:14,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:14,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:14,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:39:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:14,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:14,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:39:14,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946134149] [2021-02-19 19:39:14,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:39:14,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:14,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:39:14,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:39:14,749 INFO L87 Difference]: Start difference. First operand 150 states and 266 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:18,216 INFO L93 Difference]: Finished difference Result 347 states and 615 transitions. [2021-02-19 19:39:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 19:39:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:18,217 INFO L225 Difference]: With dead ends: 347 [2021-02-19 19:39:18,217 INFO L226 Difference]: Without dead ends: 288 [2021-02-19 19:39:18,218 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=666, Invalid=5976, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 19:39:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-02-19 19:39:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 156. [2021-02-19 19:39:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.8) internal successors, (279), 155 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:18,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 279 transitions. [2021-02-19 19:39:18,220 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 279 transitions. Word has length 39 [2021-02-19 19:39:18,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:18,220 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 279 transitions. [2021-02-19 19:39:18,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 279 transitions. [2021-02-19 19:39:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:18,221 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:18,221 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:18,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 19:39:18,436 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:18,436 INFO L82 PathProgramCache]: Analyzing trace with hash 626367735, now seen corresponding path program 28 times [2021-02-19 19:39:18,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:18,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318698873] [2021-02-19 19:39:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:18,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318698873] [2021-02-19 19:39:18,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751268452] [2021-02-19 19:39:18,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:18,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:39:18,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:39:18,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:39:18,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:19,665 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:19,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:39:19,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:19,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:19,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:19,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:39:19,787 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:19,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-02-19 19:39:19,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:19,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:19,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:19,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:54 [2021-02-19 19:39:19,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:19,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:20,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:20,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:39:20,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:20,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:20,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:20,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:39:20,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:20,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:20,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:20,047 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:39:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:20,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:20,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:39:20,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010809339] [2021-02-19 19:39:20,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:39:20,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:20,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:39:20,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:39:20,129 INFO L87 Difference]: Start difference. First operand 156 states and 279 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:22,707 INFO L93 Difference]: Finished difference Result 341 states and 601 transitions. [2021-02-19 19:39:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 19:39:22,707 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:22,708 INFO L225 Difference]: With dead ends: 341 [2021-02-19 19:39:22,708 INFO L226 Difference]: Without dead ends: 279 [2021-02-19 19:39:22,709 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=633, Invalid=5067, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 19:39:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-02-19 19:39:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 157. [2021-02-19 19:39:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.794871794871795) internal successors, (280), 156 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 280 transitions. [2021-02-19 19:39:22,711 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 280 transitions. Word has length 39 [2021-02-19 19:39:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:22,711 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 280 transitions. [2021-02-19 19:39:22,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 280 transitions. [2021-02-19 19:39:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:22,711 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:22,711 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:22,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 19:39:22,926 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:22,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:22,927 INFO L82 PathProgramCache]: Analyzing trace with hash 639486831, now seen corresponding path program 29 times [2021-02-19 19:39:22,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:22,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925580169] [2021-02-19 19:39:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:23,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925580169] [2021-02-19 19:39:23,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135751564] [2021-02-19 19:39:23,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:23,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:39:23,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:39:23,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:39:23,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:24,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:24,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:24,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:24,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-02-19 19:39:24,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:24,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:24,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 7 [2021-02-19 19:39:24,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:24,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:24,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 19:39:24,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:199, output treesize:73 [2021-02-19 19:39:24,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:24,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:24,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:24,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:24,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 [2021-02-19 19:39:24,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:24,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:24,731 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 1 [2021-02-19 19:39:24,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:24,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:24,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:24,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:165, output treesize:45 [2021-02-19 19:39:25,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:25,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:25,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:39:25,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:25,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:25,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:25,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:39:25,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:25,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:25,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:25,070 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:127, output treesize:12 [2021-02-19 19:39:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:25,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:25,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 43 [2021-02-19 19:39:25,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537975618] [2021-02-19 19:39:25,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-02-19 19:39:25,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-02-19 19:39:25,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:39:25,167 INFO L87 Difference]: Start difference. First operand 157 states and 280 transitions. Second operand has 44 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 43 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:28,919 INFO L93 Difference]: Finished difference Result 354 states and 625 transitions. [2021-02-19 19:39:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 19:39:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 43 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:28,920 INFO L225 Difference]: With dead ends: 354 [2021-02-19 19:39:28,921 INFO L226 Difference]: Without dead ends: 281 [2021-02-19 19:39:28,921 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=706, Invalid=6604, Unknown=0, NotChecked=0, Total=7310 [2021-02-19 19:39:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-02-19 19:39:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 163. [2021-02-19 19:39:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.7530864197530864) internal successors, (284), 162 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 284 transitions. [2021-02-19 19:39:28,923 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 284 transitions. Word has length 39 [2021-02-19 19:39:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:28,923 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 284 transitions. [2021-02-19 19:39:28,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 43 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 284 transitions. [2021-02-19 19:39:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:28,924 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:28,924 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:29,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-02-19 19:39:29,138 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash 760043093, now seen corresponding path program 30 times [2021-02-19 19:39:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:29,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273446071] [2021-02-19 19:39:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:29,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273446071] [2021-02-19 19:39:29,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392061715] [2021-02-19 19:39:29,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:29,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:39:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:39:29,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 81 conjunts are in the unsatisfiable core [2021-02-19 19:39:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:30,567 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:30,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:39:30,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:30,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:30,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:30,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:39:30,709 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:39:30,709 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 34 treesize of output 18 [2021-02-19 19:39:30,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:30,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:30,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:30,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:54 [2021-02-19 19:39:30,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:30,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:31,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:31,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:39:31,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:31,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:31,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:39:31,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:31,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:31,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:31,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:39:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:31,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:31,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:39:31,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643543137] [2021-02-19 19:39:31,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:39:31,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:31,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:39:31,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:39:31,203 INFO L87 Difference]: Start difference. First operand 163 states and 284 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:37,230 INFO L93 Difference]: Finished difference Result 451 states and 790 transitions. [2021-02-19 19:39:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-02-19 19:39:37,230 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:37,231 INFO L225 Difference]: With dead ends: 451 [2021-02-19 19:39:37,231 INFO L226 Difference]: Without dead ends: 377 [2021-02-19 19:39:37,231 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3216 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1055, Invalid=10935, Unknown=0, NotChecked=0, Total=11990 [2021-02-19 19:39:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-02-19 19:39:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 168. [2021-02-19 19:39:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.7664670658682635) internal successors, (295), 167 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 295 transitions. [2021-02-19 19:39:37,233 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 295 transitions. Word has length 39 [2021-02-19 19:39:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:37,233 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 295 transitions. [2021-02-19 19:39:37,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 295 transitions. [2021-02-19 19:39:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:37,234 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:37,234 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:37,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:37,434 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:37,435 INFO L82 PathProgramCache]: Analyzing trace with hash 169954645, now seen corresponding path program 31 times [2021-02-19 19:39:37,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:37,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41657703] [2021-02-19 19:39:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:38,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41657703] [2021-02-19 19:39:38,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68509192] [2021-02-19 19:39:38,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:38,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:39:38,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:38,835 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:38,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:39:38,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:38,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:38,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:38,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:39:38,967 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:38,968 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 15 [2021-02-19 19:39:38,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:38,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:38,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:38,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:39:39,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:39,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:39:39,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:39,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:39,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:39,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:39:39,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:39,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:39,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:39,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:39:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:39,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:39,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-02-19 19:39:39,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028928901] [2021-02-19 19:39:39,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:39:39,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:39:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:39:39,335 INFO L87 Difference]: Start difference. First operand 168 states and 295 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:41,963 INFO L93 Difference]: Finished difference Result 331 states and 582 transitions. [2021-02-19 19:39:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 19:39:41,964 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:41,964 INFO L225 Difference]: With dead ends: 331 [2021-02-19 19:39:41,964 INFO L226 Difference]: Without dead ends: 269 [2021-02-19 19:39:41,965 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=573, Invalid=4539, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 19:39:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-02-19 19:39:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2021-02-19 19:39:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.7590361445783131) internal successors, (292), 166 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 292 transitions. [2021-02-19 19:39:41,967 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 292 transitions. Word has length 39 [2021-02-19 19:39:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:41,967 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 292 transitions. [2021-02-19 19:39:41,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 292 transitions. [2021-02-19 19:39:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:41,967 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:41,967 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:42,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:42,170 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:42,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2121241799, now seen corresponding path program 32 times [2021-02-19 19:39:42,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:42,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068134243] [2021-02-19 19:39:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:42,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068134243] [2021-02-19 19:39:42,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454068621] [2021-02-19 19:39:42,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:42,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:39:42,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:39:42,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 80 conjunts are in the unsatisfiable core [2021-02-19 19:39:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:43,530 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:43,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:39:43,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:43,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:43,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:43,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:39:43,712 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:43,713 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 15 [2021-02-19 19:39:43,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:43,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:43,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:43,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:39:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:43,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:43,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:43,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:39:44,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:44,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:44,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:44,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 1 [2021-02-19 19:39:44,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:44,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:44,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:44,030 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:135, output treesize:12 [2021-02-19 19:39:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:44,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:44,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:39:44,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216012843] [2021-02-19 19:39:44,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:39:44,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:44,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:39:44,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:39:44,125 INFO L87 Difference]: Start difference. First operand 167 states and 292 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:46,211 INFO L93 Difference]: Finished difference Result 388 states and 712 transitions. [2021-02-19 19:39:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:39:46,212 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:46,212 INFO L225 Difference]: With dead ends: 388 [2021-02-19 19:39:46,212 INFO L226 Difference]: Without dead ends: 264 [2021-02-19 19:39:46,212 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=447, Invalid=3459, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:39:46,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-02-19 19:39:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 185. [2021-02-19 19:39:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.7228260869565217) internal successors, (317), 184 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 317 transitions. [2021-02-19 19:39:46,214 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 317 transitions. Word has length 39 [2021-02-19 19:39:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:46,214 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 317 transitions. [2021-02-19 19:39:46,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 317 transitions. [2021-02-19 19:39:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:46,215 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:46,215 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:46,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-02-19 19:39:46,415 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:46,416 INFO L82 PathProgramCache]: Analyzing trace with hash -584778399, now seen corresponding path program 33 times [2021-02-19 19:39:46,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:46,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404601882] [2021-02-19 19:39:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:47,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404601882] [2021-02-19 19:39:47,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953684478] [2021-02-19 19:39:47,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:47,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:39:47,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:39:47,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 81 conjunts are in the unsatisfiable core [2021-02-19 19:39:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:47,947 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:47,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:39:47,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:47,987 INFO L628 ElimStorePlain]: treesize reduction 5, result has 92.9 percent of original size [2021-02-19 19:39:47,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:39:47,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:82, output treesize:65 [2021-02-19 19:39:48,143 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:48,143 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 15 [2021-02-19 19:39:48,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:48,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:48,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:39:48,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:55 [2021-02-19 19:39:48,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:48,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:48,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-02-19 19:39:48,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:48,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:48,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 1 [2021-02-19 19:39:48,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:48,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:48,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:48,546 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:137, output treesize:12 [2021-02-19 19:39:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:48,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:48,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:39:48,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627363226] [2021-02-19 19:39:48,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:39:48,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:48,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:39:48,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:39:48,686 INFO L87 Difference]: Start difference. First operand 185 states and 317 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:52,933 INFO L93 Difference]: Finished difference Result 376 states and 656 transitions. [2021-02-19 19:39:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 19:39:52,933 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:52,934 INFO L225 Difference]: With dead ends: 376 [2021-02-19 19:39:52,934 INFO L226 Difference]: Without dead ends: 317 [2021-02-19 19:39:52,934 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=669, Invalid=5973, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 19:39:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-02-19 19:39:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 191. [2021-02-19 19:39:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.736842105263158) internal successors, (330), 190 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 330 transitions. [2021-02-19 19:39:52,936 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 330 transitions. Word has length 39 [2021-02-19 19:39:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:52,936 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 330 transitions. [2021-02-19 19:39:52,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 330 transitions. [2021-02-19 19:39:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:52,937 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:52,937 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:53,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:53,138 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:53,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:53,138 INFO L82 PathProgramCache]: Analyzing trace with hash -647586395, now seen corresponding path program 34 times [2021-02-19 19:39:53,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:53,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293713407] [2021-02-19 19:39:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:53,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293713407] [2021-02-19 19:39:53,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727733813] [2021-02-19 19:39:53,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:53,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:39:53,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:39:53,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:39:53,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:54,771 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:54,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:39:54,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:54,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:54,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:54,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:39:54,918 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:54,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-02-19 19:39:54,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:54,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:54,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:54,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:54 [2021-02-19 19:39:55,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:55,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:55,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:39:55,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:55,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:55,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:55,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:39:55,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:55,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:55,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:55,231 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:39:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:39:55,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:39:55,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:39:55,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819482215] [2021-02-19 19:39:55,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:39:55,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:39:55,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:39:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:39:55,337 INFO L87 Difference]: Start difference. First operand 191 states and 330 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:39:57,866 INFO L93 Difference]: Finished difference Result 375 states and 647 transitions. [2021-02-19 19:39:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 19:39:57,867 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:39:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:39:57,867 INFO L225 Difference]: With dead ends: 375 [2021-02-19 19:39:57,867 INFO L226 Difference]: Without dead ends: 313 [2021-02-19 19:39:57,867 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=576, Invalid=4680, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 19:39:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-02-19 19:39:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 187. [2021-02-19 19:39:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.7258064516129032) internal successors, (321), 186 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 321 transitions. [2021-02-19 19:39:57,870 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 321 transitions. Word has length 39 [2021-02-19 19:39:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:39:57,870 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 321 transitions. [2021-02-19 19:39:57,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:39:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 321 transitions. [2021-02-19 19:39:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:39:57,870 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:39:57,870 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:39:58,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-02-19 19:39:58,087 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:39:58,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:39:58,087 INFO L82 PathProgramCache]: Analyzing trace with hash -634467299, now seen corresponding path program 35 times [2021-02-19 19:39:58,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:39:58,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318515144] [2021-02-19 19:39:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:39:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:39:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:39:58,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318515144] [2021-02-19 19:39:58,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968368967] [2021-02-19 19:39:58,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:39:58,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:39:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:39:58,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:39:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:39:59,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:59,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:59,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:59,815 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-02-19 19:39:59,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:59,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:39:59,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:39:59,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 7 [2021-02-19 19:39:59,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:59,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:59,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:59,852 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:169, output treesize:58 [2021-02-19 19:39:59,920 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:39:59,920 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 15 [2021-02-19 19:39:59,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:39:59,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:39:59,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:39:59,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:43 [2021-02-19 19:40:00,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:00,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:40:00,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:00,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:00,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:00,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:40:00,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:00,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:00,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:00,314 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:40:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:40:00,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:40:00,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:40:00,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626204995] [2021-02-19 19:40:00,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:40:00,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:40:00,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:40:00,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:40:00,426 INFO L87 Difference]: Start difference. First operand 187 states and 321 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:40:03,344 INFO L93 Difference]: Finished difference Result 366 states and 631 transitions. [2021-02-19 19:40:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 19:40:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:40:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:40:03,345 INFO L225 Difference]: With dead ends: 366 [2021-02-19 19:40:03,345 INFO L226 Difference]: Without dead ends: 303 [2021-02-19 19:40:03,346 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=554, Invalid=4416, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 19:40:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-19 19:40:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 186. [2021-02-19 19:40:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.7243243243243243) internal successors, (319), 185 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 319 transitions. [2021-02-19 19:40:03,348 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 319 transitions. Word has length 39 [2021-02-19 19:40:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:40:03,348 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 319 transitions. [2021-02-19 19:40:03,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 319 transitions. [2021-02-19 19:40:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:40:03,348 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:40:03,348 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:40:03,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:03,558 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:40:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:40:03,559 INFO L82 PathProgramCache]: Analyzing trace with hash 904321143, now seen corresponding path program 36 times [2021-02-19 19:40:03,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:40:03,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843097632] [2021-02-19 19:40:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:40:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:40:04,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843097632] [2021-02-19 19:40:04,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102385299] [2021-02-19 19:40:04,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:04,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:40:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:40:04,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 79 conjunts are in the unsatisfiable core [2021-02-19 19:40:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:40:05,282 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:05,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:40:05,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:05,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:05,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:05,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:40:05,391 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:05,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-02-19 19:40:05,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:05,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:05,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:05,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:43 [2021-02-19 19:40:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:05,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:05,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:40:05,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:05,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:05,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:05,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:40:05,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:05,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:05,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:05,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:40:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:40:06,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:40:06,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:40:06,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818476994] [2021-02-19 19:40:06,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:40:06,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:40:06,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:40:06,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:40:06,086 INFO L87 Difference]: Start difference. First operand 186 states and 319 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:40:10,904 INFO L93 Difference]: Finished difference Result 379 states and 657 transitions. [2021-02-19 19:40:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 19:40:10,905 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:40:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:40:10,906 INFO L225 Difference]: With dead ends: 379 [2021-02-19 19:40:10,906 INFO L226 Difference]: Without dead ends: 306 [2021-02-19 19:40:10,907 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=699, Invalid=5943, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 19:40:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-02-19 19:40:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 170. [2021-02-19 19:40:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.7455621301775148) internal successors, (295), 169 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 295 transitions. [2021-02-19 19:40:10,909 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 295 transitions. Word has length 39 [2021-02-19 19:40:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:40:10,909 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 295 transitions. [2021-02-19 19:40:10,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 295 transitions. [2021-02-19 19:40:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:40:10,909 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:40:10,909 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:40:11,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-02-19 19:40:11,110 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:40:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:40:11,111 INFO L82 PathProgramCache]: Analyzing trace with hash -513911037, now seen corresponding path program 37 times [2021-02-19 19:40:11,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:40:11,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39836121] [2021-02-19 19:40:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:40:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:40:11,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39836121] [2021-02-19 19:40:11,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041982721] [2021-02-19 19:40:11,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:12,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 80 conjunts are in the unsatisfiable core [2021-02-19 19:40:12,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:40:13,099 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:13,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:40:13,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:13,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:13,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:13,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:40:13,310 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:13,310 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 15 [2021-02-19 19:40:13,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:13,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:13,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:13,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:40:13,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:13,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 1 [2021-02-19 19:40:13,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:13,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:13,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:13,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:40:13,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:13,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:13,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:13,718 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:135, output treesize:12 [2021-02-19 19:40:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:40:13,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:40:13,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:40:13,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99888452] [2021-02-19 19:40:13,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:40:13,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:40:13,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:40:13,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1498, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:40:13,839 INFO L87 Difference]: Start difference. First operand 170 states and 295 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:40:16,434 INFO L93 Difference]: Finished difference Result 338 states and 592 transitions. [2021-02-19 19:40:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 19:40:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:40:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:40:16,435 INFO L225 Difference]: With dead ends: 338 [2021-02-19 19:40:16,435 INFO L226 Difference]: Without dead ends: 279 [2021-02-19 19:40:16,436 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=502, Invalid=4190, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 19:40:16,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-02-19 19:40:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 174. [2021-02-19 19:40:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.7572254335260116) internal successors, (304), 173 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 304 transitions. [2021-02-19 19:40:16,438 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 304 transitions. Word has length 39 [2021-02-19 19:40:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:40:16,438 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 304 transitions. [2021-02-19 19:40:16,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 304 transitions. [2021-02-19 19:40:16,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:40:16,439 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:40:16,439 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:40:16,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-02-19 19:40:16,656 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:40:16,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:40:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1103999485, now seen corresponding path program 38 times [2021-02-19 19:40:16,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:40:16,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193506153] [2021-02-19 19:40:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:40:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:40:17,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193506153] [2021-02-19 19:40:17,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132065279] [2021-02-19 19:40:17,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:17,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:40:17,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:40:17,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:40:17,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:40:18,793 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:18,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:40:18,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:18,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:18,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:18,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:40:18,996 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:18,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-02-19 19:40:18,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:19,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:19,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:19,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:54 [2021-02-19 19:40:19,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:19,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:19,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:40:19,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:19,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:19,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:19,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:40:19,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:19,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:19,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:19,430 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:40:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:40:19,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:40:19,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:40:19,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90000250] [2021-02-19 19:40:19,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:40:19,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:40:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:40:19,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:40:19,566 INFO L87 Difference]: Start difference. First operand 174 states and 304 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:40:22,511 INFO L93 Difference]: Finished difference Result 330 states and 570 transitions. [2021-02-19 19:40:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 19:40:22,512 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:40:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:40:22,513 INFO L225 Difference]: With dead ends: 330 [2021-02-19 19:40:22,513 INFO L226 Difference]: Without dead ends: 269 [2021-02-19 19:40:22,513 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=555, Invalid=4557, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 19:40:22,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-02-19 19:40:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 126. [2021-02-19 19:40:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.872) internal successors, (234), 125 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:22,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 234 transitions. [2021-02-19 19:40:22,515 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 234 transitions. Word has length 39 [2021-02-19 19:40:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:40:22,515 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 234 transitions. [2021-02-19 19:40:22,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:22,515 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 234 transitions. [2021-02-19 19:40:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:40:22,516 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:40:22,516 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:40:22,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:22,716 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:40:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:40:22,717 INFO L82 PathProgramCache]: Analyzing trace with hash 423822749, now seen corresponding path program 39 times [2021-02-19 19:40:22,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:40:22,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205446210] [2021-02-19 19:40:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:40:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:40:23,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205446210] [2021-02-19 19:40:23,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084515488] [2021-02-19 19:40:23,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:23,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:40:23,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:40:23,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 83 conjunts are in the unsatisfiable core [2021-02-19 19:40:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:40:24,913 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:24,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:40:24,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:24,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:24,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:24,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:40:25,225 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:40:25,225 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 23 treesize of output 15 [2021-02-19 19:40:25,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:25,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:25,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:25,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:54 [2021-02-19 19:40:25,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:25,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:40:25,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:25,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:25,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:40:25,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:25,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:25,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:25,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:40:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:40:25,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:40:25,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 42 [2021-02-19 19:40:25,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056433267] [2021-02-19 19:40:25,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-02-19 19:40:25,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:40:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-02-19 19:40:25,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:40:25,909 INFO L87 Difference]: Start difference. First operand 126 states and 234 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:40:31,085 INFO L93 Difference]: Finished difference Result 344 states and 658 transitions. [2021-02-19 19:40:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 19:40:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:40:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:40:31,087 INFO L225 Difference]: With dead ends: 344 [2021-02-19 19:40:31,087 INFO L226 Difference]: Without dead ends: 220 [2021-02-19 19:40:31,087 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=502, Invalid=4328, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 19:40:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-02-19 19:40:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 140. [2021-02-19 19:40:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.8201438848920863) internal successors, (253), 139 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 253 transitions. [2021-02-19 19:40:31,089 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 253 transitions. Word has length 39 [2021-02-19 19:40:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:40:31,089 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 253 transitions. [2021-02-19 19:40:31,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 253 transitions. [2021-02-19 19:40:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:40:31,090 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:40:31,090 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:40:31,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 19:40:31,291 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:40:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:40:31,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2083637209, now seen corresponding path program 40 times [2021-02-19 19:40:31,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:40:31,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803240765] [2021-02-19 19:40:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:40:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:40:32,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803240765] [2021-02-19 19:40:32,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214237594] [2021-02-19 19:40:32,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:32,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:40:32,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:40:32,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:40:32,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:40:33,985 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:33,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:40:33,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:34,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:34,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:34,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:58 [2021-02-19 19:40:34,216 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:34,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-02-19 19:40:34,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:34,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:34,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:34,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:40:34,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:34,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:34,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:40:34,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:34,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:34,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:34,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:40:34,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:34,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:34,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:34,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:40:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:40:34,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:40:34,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 42 [2021-02-19 19:40:34,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746524646] [2021-02-19 19:40:34,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-02-19 19:40:34,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:40:34,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-02-19 19:40:34,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:40:34,934 INFO L87 Difference]: Start difference. First operand 140 states and 253 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:40:39,590 INFO L93 Difference]: Finished difference Result 295 states and 533 transitions. [2021-02-19 19:40:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 19:40:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:40:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:40:39,591 INFO L225 Difference]: With dead ends: 295 [2021-02-19 19:40:39,591 INFO L226 Difference]: Without dead ends: 236 [2021-02-19 19:40:39,591 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=511, Invalid=4319, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 19:40:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-19 19:40:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 144. [2021-02-19 19:40:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.832167832167832) internal successors, (262), 143 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 262 transitions. [2021-02-19 19:40:39,593 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 262 transitions. Word has length 39 [2021-02-19 19:40:39,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:40:39,594 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 262 transitions. [2021-02-19 19:40:39,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 262 transitions. [2021-02-19 19:40:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:40:39,594 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:40:39,594 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:40:39,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:39,795 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:40:39,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:40:39,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1493548761, now seen corresponding path program 41 times [2021-02-19 19:40:39,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:40:39,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726398809] [2021-02-19 19:40:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:40:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:40:41,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726398809] [2021-02-19 19:40:41,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799118490] [2021-02-19 19:40:41,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:41,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:40:41,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:40:41,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:40:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:40:42,622 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:42,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:40:42,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:42,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:42,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:40:42,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:63 [2021-02-19 19:40:42,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:42,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:42,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:42,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:42,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 15 [2021-02-19 19:40:42,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:42,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:42,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:42,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:42,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2021-02-19 19:40:43,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:43,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:43,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:43,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:175, output treesize:49 [2021-02-19 19:40:43,391 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-02-19 19:40:43,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 38 treesize of output 16 [2021-02-19 19:40:43,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:43,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:43,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:43,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:12 [2021-02-19 19:40:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:40:43,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:40:43,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 44 [2021-02-19 19:40:43,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479703242] [2021-02-19 19:40:43,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-02-19 19:40:43,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:40:43,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-02-19 19:40:43,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:40:43,585 INFO L87 Difference]: Start difference. First operand 144 states and 262 transitions. Second operand has 45 states, 45 states have (on average 1.511111111111111) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:40:47,770 INFO L93 Difference]: Finished difference Result 317 states and 553 transitions. [2021-02-19 19:40:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 19:40:47,771 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.511111111111111) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:40:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:40:47,772 INFO L225 Difference]: With dead ends: 317 [2021-02-19 19:40:47,772 INFO L226 Difference]: Without dead ends: 256 [2021-02-19 19:40:47,772 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=640, Invalid=5680, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 19:40:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-02-19 19:40:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 120. [2021-02-19 19:40:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 224 transitions. [2021-02-19 19:40:47,774 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 224 transitions. Word has length 39 [2021-02-19 19:40:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:40:47,774 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 224 transitions. [2021-02-19 19:40:47,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.511111111111111) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 224 transitions. [2021-02-19 19:40:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:40:47,774 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:40:47,774 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:40:47,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-02-19 19:40:47,975 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:40:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:40:47,975 INFO L82 PathProgramCache]: Analyzing trace with hash 416443805, now seen corresponding path program 42 times [2021-02-19 19:40:47,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:40:47,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921560853] [2021-02-19 19:40:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:40:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:40:49,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921560853] [2021-02-19 19:40:49,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899357563] [2021-02-19 19:40:49,209 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 [2021-02-19 19:40:49,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:40:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:40:49,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 81 conjunts are in the unsatisfiable core [2021-02-19 19:40:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:40:50,522 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:50,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:40:50,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:50,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:50,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:50,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:40:50,840 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:50,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-02-19 19:40:50,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:50,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:50,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:50,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:54 [2021-02-19 19:40:51,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:51,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:40:51,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:51,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:51,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:40:51,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:51,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:51,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:51,275 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:40:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:40:51,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:40:51,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:40:51,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994141658] [2021-02-19 19:40:51,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:40:51,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:40:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:40:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:40:51,439 INFO L87 Difference]: Start difference. First operand 120 states and 224 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:40:54,378 INFO L93 Difference]: Finished difference Result 433 states and 827 transitions. [2021-02-19 19:40:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 19:40:54,379 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:40:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:40:54,380 INFO L225 Difference]: With dead ends: 433 [2021-02-19 19:40:54,380 INFO L226 Difference]: Without dead ends: 261 [2021-02-19 19:40:54,380 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=459, Invalid=3447, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:40:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-02-19 19:40:54,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 159. [2021-02-19 19:40:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.7911392405063291) internal successors, (283), 158 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 283 transitions. [2021-02-19 19:40:54,382 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 283 transitions. Word has length 39 [2021-02-19 19:40:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:40:54,382 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 283 transitions. [2021-02-19 19:40:54,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:40:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 283 transitions. [2021-02-19 19:40:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:40:54,382 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:40:54,383 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:40:54,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:40:54,598 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:40:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:40:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash 353635809, now seen corresponding path program 43 times [2021-02-19 19:40:54,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:40:54,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053452593] [2021-02-19 19:40:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:40:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:40:55,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053452593] [2021-02-19 19:40:55,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757288418] [2021-02-19 19:40:55,957 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 [2021-02-19 19:40:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:40:55,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:40:55,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:40:57,194 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:40:57,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:57,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:57,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:57,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:40:57,411 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:40:57,411 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 15 [2021-02-19 19:40:57,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:57,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:57,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:57,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:40:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:57,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:57,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:40:57,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:57,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:40:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:40:57,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:40:57,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:40:57,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:40:57,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:40:57,941 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:40:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:40:58,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:40:58,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:40:58,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519174741] [2021-02-19 19:40:58,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:40:58,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:40:58,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:40:58,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:40:58,110 INFO L87 Difference]: Start difference. First operand 159 states and 283 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:01,211 INFO L93 Difference]: Finished difference Result 301 states and 530 transitions. [2021-02-19 19:41:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 19:41:01,213 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:41:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:01,213 INFO L225 Difference]: With dead ends: 301 [2021-02-19 19:41:01,213 INFO L226 Difference]: Without dead ends: 244 [2021-02-19 19:41:01,214 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=490, Invalid=3542, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 19:41:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-02-19 19:41:01,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 159. [2021-02-19 19:41:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.7784810126582278) internal successors, (281), 158 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 281 transitions. [2021-02-19 19:41:01,216 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 281 transitions. Word has length 39 [2021-02-19 19:41:01,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:01,216 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 281 transitions. [2021-02-19 19:41:01,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 281 transitions. [2021-02-19 19:41:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:41:01,216 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:01,216 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:01,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:01,431 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:01,431 INFO L82 PathProgramCache]: Analyzing trace with hash -853235341, now seen corresponding path program 44 times [2021-02-19 19:41:01,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:01,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682620616] [2021-02-19 19:41:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:41:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682620616] [2021-02-19 19:41:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710672524] [2021-02-19 19:41:02,897 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 [2021-02-19 19:41:02,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:41:02,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:02,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:41:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:04,275 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:41:04,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:41:04,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:04,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:04,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:04,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:41:04,776 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:41:04,776 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 15 [2021-02-19 19:41:04,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:04,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:04,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:04,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:50 [2021-02-19 19:41:05,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:05,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:05,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:41:05,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:05,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:05,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:05,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:41:05,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:05,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:05,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:05,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:41:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:05,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:05,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:41:05,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690186077] [2021-02-19 19:41:05,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:41:05,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:05,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:41:05,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:41:05,350 INFO L87 Difference]: Start difference. First operand 159 states and 281 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:10,269 INFO L93 Difference]: Finished difference Result 322 states and 565 transitions. [2021-02-19 19:41:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 19:41:10,271 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:41:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:10,271 INFO L225 Difference]: With dead ends: 322 [2021-02-19 19:41:10,271 INFO L226 Difference]: Without dead ends: 261 [2021-02-19 19:41:10,272 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=459, Invalid=3447, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:41:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-02-19 19:41:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 161. [2021-02-19 19:41:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.775) internal successors, (284), 160 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 284 transitions. [2021-02-19 19:41:10,274 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 284 transitions. Word has length 39 [2021-02-19 19:41:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:10,274 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 284 transitions. [2021-02-19 19:41:10,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 284 transitions. [2021-02-19 19:41:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:41:10,274 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:10,274 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:10,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-02-19 19:41:10,475 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:10,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1526573983, now seen corresponding path program 45 times [2021-02-19 19:41:10,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:10,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349533506] [2021-02-19 19:41:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:41:11,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349533506] [2021-02-19 19:41:11,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460621248] [2021-02-19 19:41:11,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:11,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:41:11,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:11,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 80 conjunts are in the unsatisfiable core [2021-02-19 19:41:11,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:13,107 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-02-19 19:41:13,262 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:41:13,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:41:13,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:13,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:13,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:13,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:41:13,679 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:41:13,679 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 32 treesize of output 18 [2021-02-19 19:41:13,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:13,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:13,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:13,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:54 [2021-02-19 19:41:14,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:14,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:14,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:41:14,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:14,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:14,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:41:14,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:14,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:14,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:14,327 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:41:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:14,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:14,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:41:14,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46473410] [2021-02-19 19:41:14,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:41:14,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:14,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:41:14,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:41:14,593 INFO L87 Difference]: Start difference. First operand 161 states and 284 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:21,259 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 19:41:21,889 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-02-19 19:41:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:22,031 INFO L93 Difference]: Finished difference Result 341 states and 600 transitions. [2021-02-19 19:41:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 19:41:22,032 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:41:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:22,033 INFO L225 Difference]: With dead ends: 341 [2021-02-19 19:41:22,033 INFO L226 Difference]: Without dead ends: 282 [2021-02-19 19:41:22,033 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=656, Invalid=5664, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 19:41:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-02-19 19:41:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 163. [2021-02-19 19:41:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.7777777777777777) internal successors, (288), 162 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 288 transitions. [2021-02-19 19:41:22,035 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 288 transitions. Word has length 39 [2021-02-19 19:41:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:22,035 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 288 transitions. [2021-02-19 19:41:22,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 288 transitions. [2021-02-19 19:41:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:41:22,036 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:22,036 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:22,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:22,236 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1589381979, now seen corresponding path program 46 times [2021-02-19 19:41:22,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:22,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015770081] [2021-02-19 19:41:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:41:23,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015770081] [2021-02-19 19:41:23,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256583058] [2021-02-19 19:41:23,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:23,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:41:23,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:23,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 78 conjunts are in the unsatisfiable core [2021-02-19 19:41:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:25,027 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:41:25,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:41:25,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:25,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:25,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:25,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:56 [2021-02-19 19:41:25,383 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:41:25,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-02-19 19:41:25,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:25,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:25,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:25,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:54 [2021-02-19 19:41:25,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:25,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:25,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:41:25,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:25,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:25,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:25,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:41:25,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:25,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:25,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:25,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:41:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:26,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:26,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:41:26,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555564375] [2021-02-19 19:41:26,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:41:26,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:26,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:41:26,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:41:26,112 INFO L87 Difference]: Start difference. First operand 163 states and 288 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:30,648 INFO L93 Difference]: Finished difference Result 336 states and 585 transitions. [2021-02-19 19:41:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 19:41:30,650 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:41:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:30,650 INFO L225 Difference]: With dead ends: 336 [2021-02-19 19:41:30,650 INFO L226 Difference]: Without dead ends: 276 [2021-02-19 19:41:30,650 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=577, Invalid=4535, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 19:41:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-02-19 19:41:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 164. [2021-02-19 19:41:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.7791411042944785) internal successors, (290), 163 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 290 transitions. [2021-02-19 19:41:30,652 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 290 transitions. Word has length 39 [2021-02-19 19:41:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:30,652 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 290 transitions. [2021-02-19 19:41:30,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 290 transitions. [2021-02-19 19:41:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:41:30,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:30,653 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:30,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-02-19 19:41:30,853 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:30,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1576262883, now seen corresponding path program 47 times [2021-02-19 19:41:30,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:30,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117582708] [2021-02-19 19:41:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:41:32,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117582708] [2021-02-19 19:41:32,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007290369] [2021-02-19 19:41:32,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:32,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:41:32,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:32,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 82 conjunts are in the unsatisfiable core [2021-02-19 19:41:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:33,074 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 19:41:33,768 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-02-19 19:41:33,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:33,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:33,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:33,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-02-19 19:41:33,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:33,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:33,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-02-19 19:41:33,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:34,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:34,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:34,033 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:165, output treesize:56 [2021-02-19 19:41:34,241 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:41:34,242 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 15 [2021-02-19 19:41:34,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:34,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:34,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:34,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:43 [2021-02-19 19:41:34,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:34,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:41:34,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:34,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:34,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:34,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 1 [2021-02-19 19:41:34,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:34,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:34,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:34,927 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:123, output treesize:12 [2021-02-19 19:41:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:35,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:35,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 41 [2021-02-19 19:41:35,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006312768] [2021-02-19 19:41:35,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:41:35,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:41:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:41:35,118 INFO L87 Difference]: Start difference. First operand 164 states and 290 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:37,874 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-19 19:41:38,276 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-02-19 19:41:39,572 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 19:41:42,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:42,358 INFO L93 Difference]: Finished difference Result 323 states and 563 transitions. [2021-02-19 19:41:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 19:41:42,360 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:41:42,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:42,360 INFO L225 Difference]: With dead ends: 323 [2021-02-19 19:41:42,361 INFO L226 Difference]: Without dead ends: 260 [2021-02-19 19:41:42,361 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=599, Invalid=4657, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 19:41:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-02-19 19:41:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 160. [2021-02-19 19:41:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.7735849056603774) internal successors, (282), 159 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 282 transitions. [2021-02-19 19:41:42,363 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 282 transitions. Word has length 39 [2021-02-19 19:41:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:42,363 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 282 transitions. [2021-02-19 19:41:42,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 282 transitions. [2021-02-19 19:41:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:41:42,363 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:42,363 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:42,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:42,566 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:42,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:42,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1391331547, now seen corresponding path program 48 times [2021-02-19 19:41:42,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:42,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575024916] [2021-02-19 19:41:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:43,114 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 19:41:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-19 19:41:44,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575024916] [2021-02-19 19:41:44,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278924008] [2021-02-19 19:41:44,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:44,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:41:44,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:44,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 127 conjunts are in the unsatisfiable core [2021-02-19 19:41:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:45,580 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-02-19 19:41:46,259 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 19:41:46,618 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 19:41:46,847 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 19:41:47,512 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-02-19 19:41:47,711 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:41:47,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-02-19 19:41:47,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:47,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:47,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:47,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:110, output treesize:91 [2021-02-19 19:41:48,329 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-02-19 19:41:48,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 22 [2021-02-19 19:41:48,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:48,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:48,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:48,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:119, output treesize:86 [2021-02-19 19:41:49,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:49,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:49,228 INFO L244 Elim1Store]: Index analysis took 171 ms [2021-02-19 19:41:49,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 1 [2021-02-19 19:41:49,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:49,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:41:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:41:49,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 25 [2021-02-19 19:41:49,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:41:49,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:41:49,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:41:49,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:187, output treesize:19 [2021-02-19 19:41:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:49,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:49,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 38] total 54 [2021-02-19 19:41:49,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989891605] [2021-02-19 19:41:49,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-02-19 19:41:49,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-02-19 19:41:49,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:41:49,737 INFO L87 Difference]: Start difference. First operand 160 states and 282 transitions. Second operand has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:52,048 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 19:41:52,279 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-02-19 19:41:52,522 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-02-19 19:41:52,763 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 19:41:53,026 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-02-19 19:41:53,286 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-02-19 19:41:53,534 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-02-19 19:41:53,926 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-02-19 19:41:54,172 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-02-19 19:41:54,568 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 19:41:54,803 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 19:41:55,276 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-02-19 19:41:56,217 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 19:41:56,496 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-02-19 19:41:56,887 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 19:41:57,354 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-02-19 19:41:57,777 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-02-19 19:41:58,058 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-02-19 19:41:58,522 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 19:41:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:59,520 INFO L93 Difference]: Finished difference Result 646 states and 1282 transitions. [2021-02-19 19:41:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 19:41:59,522 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 19:41:59,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:59,523 INFO L225 Difference]: With dead ends: 646 [2021-02-19 19:41:59,523 INFO L226 Difference]: Without dead ends: 331 [2021-02-19 19:41:59,523 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 19 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2398 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=804, Invalid=7938, Unknown=0, NotChecked=0, Total=8742 [2021-02-19 19:41:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-02-19 19:41:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 201. [2021-02-19 19:41:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.715) internal successors, (343), 200 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 343 transitions. [2021-02-19 19:41:59,525 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 343 transitions. Word has length 51 [2021-02-19 19:41:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:59,525 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 343 transitions. [2021-02-19 19:41:59,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 343 transitions. [2021-02-19 19:41:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:41:59,526 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:59,526 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:59,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-02-19 19:41:59,728 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash 121652401, now seen corresponding path program 49 times [2021-02-19 19:41:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:59,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024462832] [2021-02-19 19:41:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:00,123 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 19:42:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-19 19:42:01,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024462832] [2021-02-19 19:42:01,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383963313] [2021-02-19 19:42:01,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:01,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 120 conjunts are in the unsatisfiable core [2021-02-19 19:42:01,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:02,918 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-02-19 19:42:03,240 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-02-19 19:42:04,325 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 19:42:04,575 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 19:42:05,376 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-02-19 19:42:05,585 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:42:05,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-02-19 19:42:05,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:05,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:42:05,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:42:05,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:110, output treesize:91 [2021-02-19 19:42:06,356 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 19:42:06,375 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:42:06,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 28 [2021-02-19 19:42:06,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:06,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:42:06,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:42:06,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:113, output treesize:82 [2021-02-19 19:42:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:06,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:06,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:07,082 INFO L244 Elim1Store]: Index analysis took 194 ms [2021-02-19 19:42:07,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 1 [2021-02-19 19:42:07,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:07,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:07,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:07,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 25 [2021-02-19 19:42:07,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:07,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:42:07,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:42:07,218 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:187, output treesize:19 [2021-02-19 19:42:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:07,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:07,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 38] total 54 [2021-02-19 19:42:07,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355808912] [2021-02-19 19:42:07,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-02-19 19:42:07,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:07,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-02-19 19:42:07,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2625, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:42:07,535 INFO L87 Difference]: Start difference. First operand 201 states and 343 transitions. Second operand has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:10,460 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-02-19 19:42:10,908 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 19:42:11,374 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 19:42:12,123 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 19:42:13,030 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-02-19 19:42:14,728 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 19:42:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:15,858 INFO L93 Difference]: Finished difference Result 453 states and 795 transitions. [2021-02-19 19:42:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-02-19 19:42:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 19:42:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:15,859 INFO L225 Difference]: With dead ends: 453 [2021-02-19 19:42:15,859 INFO L226 Difference]: Without dead ends: 366 [2021-02-19 19:42:15,860 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 16 SyntacticMatches, 19 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=784, Invalid=7772, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 19:42:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-02-19 19:42:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 200. [2021-02-19 19:42:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.7185929648241205) internal successors, (342), 199 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 342 transitions. [2021-02-19 19:42:15,862 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 342 transitions. Word has length 51 [2021-02-19 19:42:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:15,862 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 342 transitions. [2021-02-19 19:42:15,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:15,862 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 342 transitions. [2021-02-19 19:42:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:42:15,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:15,862 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:16,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:16,063 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:16,063 INFO L82 PathProgramCache]: Analyzing trace with hash -551686241, now seen corresponding path program 50 times [2021-02-19 19:42:16,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:16,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324686296] [2021-02-19 19:42:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:16,868 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 19:42:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-19 19:42:18,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324686296] [2021-02-19 19:42:18,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453441219] [2021-02-19 19:42:18,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:18,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:18,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:18,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 120 conjunts are in the unsatisfiable core [2021-02-19 19:42:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:19,651 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-02-19 19:42:20,132 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-02-19 19:42:20,840 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 19:42:21,101 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 19:42:21,871 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-02-19 19:42:22,084 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:42:22,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-02-19 19:42:22,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:22,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:42:22,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:42:22,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:110, output treesize:91 [2021-02-19 19:42:22,740 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:42:22,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 22 [2021-02-19 19:42:22,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:22,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:42:22,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:42:22,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:117, output treesize:86 [2021-02-19 19:42:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:23,688 INFO L244 Elim1Store]: Index analysis took 179 ms [2021-02-19 19:42:23,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 1 [2021-02-19 19:42:23,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:23,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 25 [2021-02-19 19:42:23,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:23,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:42:23,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:42:23,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:187, output treesize:19 [2021-02-19 19:42:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:24,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:24,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 38] total 54 [2021-02-19 19:42:24,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749022776] [2021-02-19 19:42:24,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-02-19 19:42:24,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:24,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-02-19 19:42:24,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2637, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:42:24,151 INFO L87 Difference]: Start difference. First operand 200 states and 342 transitions. Second operand has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:26,858 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-02-19 19:42:27,049 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-02-19 19:42:27,269 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-02-19 19:42:27,607 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 19:42:27,850 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-02-19 19:42:28,164 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-02-19 19:42:28,897 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 19:42:29,241 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2021-02-19 19:42:29,564 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-02-19 19:42:29,888 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-02-19 19:42:30,309 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-02-19 19:42:32,382 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 19:42:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:33,423 INFO L93 Difference]: Finished difference Result 460 states and 815 transitions. [2021-02-19 19:42:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-02-19 19:42:33,425 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 19:42:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:33,426 INFO L225 Difference]: With dead ends: 460 [2021-02-19 19:42:33,426 INFO L226 Difference]: Without dead ends: 378 [2021-02-19 19:42:33,426 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 16 SyntacticMatches, 19 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=860, Invalid=8842, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 19:42:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-02-19 19:42:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 202. [2021-02-19 19:42:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.7213930348258706) internal successors, (346), 201 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 346 transitions. [2021-02-19 19:42:33,429 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 346 transitions. Word has length 51 [2021-02-19 19:42:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:33,429 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 346 transitions. [2021-02-19 19:42:33,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 346 transitions. [2021-02-19 19:42:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:42:33,429 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:33,429 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:33,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-02-19 19:42:33,634 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:33,634 INFO L82 PathProgramCache]: Analyzing trace with hash -614494237, now seen corresponding path program 51 times [2021-02-19 19:42:33,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:33,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053019352] [2021-02-19 19:42:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:34,253 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 19:42:34,447 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 19:42:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-19 19:42:35,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053019352] [2021-02-19 19:42:35,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727433959] [2021-02-19 19:42:35,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:42:35,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:42:35,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:35,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 125 conjunts are in the unsatisfiable core [2021-02-19 19:42:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:36,723 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 19:42:36,909 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 19:42:37,210 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-02-19 19:42:38,265 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 19:42:38,707 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 19:42:38,988 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 19:42:39,917 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-02-19 19:42:40,170 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:42:40,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-02-19 19:42:40,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:40,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:42:40,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:42:40,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:110, output treesize:91 [2021-02-19 19:42:41,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:41,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:41,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:41,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:41,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:41,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:41,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-02-19 19:42:41,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:41,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:41,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:41,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:41,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:41,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 1 [2021-02-19 19:42:41,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:41,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:42:41,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:42:41,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:271, output treesize:86 [2021-02-19 19:42:41,683 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-02-19 19:42:42,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:42,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:42,243 INFO L244 Elim1Store]: Index analysis took 215 ms [2021-02-19 19:42:42,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 1 [2021-02-19 19:42:42,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:42:42,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:42:42,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 25 [2021-02-19 19:42:42,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:42:42,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:42:42,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:42:42,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:187, output treesize:19 [2021-02-19 19:42:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:42,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:42,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 38] total 54 [2021-02-19 19:42:42,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713406717] [2021-02-19 19:42:42,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-02-19 19:42:42,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:42,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-02-19 19:42:42,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:42:42,863 INFO L87 Difference]: Start difference. First operand 202 states and 346 transitions. Second operand has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:45,591 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-02-19 19:42:46,132 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 19:42:46,629 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-02-19 19:42:47,020 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-02-19 19:42:47,486 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 19:42:47,863 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 19:42:48,163 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-02-19 19:42:48,477 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-02-19 19:42:48,779 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-02-19 19:42:49,013 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-02-19 19:42:49,327 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-02-19 19:42:49,573 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-02-19 19:42:50,010 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-02-19 19:42:50,384 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-02-19 19:42:51,074 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-02-19 19:42:51,412 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-02-19 19:42:51,749 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 19:42:52,348 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-02-19 19:42:52,739 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-02-19 19:42:53,213 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 19:42:53,708 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-02-19 19:42:53,963 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-02-19 19:42:54,237 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-02-19 19:42:54,530 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-02-19 19:42:55,059 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 19:42:55,572 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-02-19 19:42:55,840 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 19:42:56,554 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 19:42:56,908 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 19:42:57,623 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-02-19 19:42:58,285 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-02-19 19:42:58,664 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-02-19 19:42:59,023 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-02-19 19:42:59,422 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 19:42:59,878 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-02-19 19:43:00,408 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-02-19 19:43:00,762 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 19:43:01,320 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-02-19 19:43:01,761 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 19:43:02,365 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-02-19 19:43:02,754 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 19:43:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:02,815 INFO L93 Difference]: Finished difference Result 498 states and 881 transitions. [2021-02-19 19:43:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-02-19 19:43:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 19:43:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:02,818 INFO L225 Difference]: With dead ends: 498 [2021-02-19 19:43:02,818 INFO L226 Difference]: Without dead ends: 383 [2021-02-19 19:43:02,819 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 16 SyntacticMatches, 19 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3991 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=1141, Invalid=12665, Unknown=0, NotChecked=0, Total=13806 [2021-02-19 19:43:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-02-19 19:43:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 203. [2021-02-19 19:43:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.7227722772277227) internal successors, (348), 202 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 348 transitions. [2021-02-19 19:43:02,821 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 348 transitions. Word has length 51 [2021-02-19 19:43:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:02,821 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 348 transitions. [2021-02-19 19:43:02,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 348 transitions. [2021-02-19 19:43:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:43:02,822 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:02,822 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:03,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-02-19 19:43:03,026 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:03,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:03,026 INFO L82 PathProgramCache]: Analyzing trace with hash -601375141, now seen corresponding path program 52 times [2021-02-19 19:43:03,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:03,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960968395] [2021-02-19 19:43:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:03,701 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 19:43:03,920 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 19:43:04,321 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-02-19 19:43:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-19 19:43:05,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960968395] [2021-02-19 19:43:05,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764088217] [2021-02-19 19:43:05,379 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 [2021-02-19 19:43:05,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:43:05,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:05,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 120 conjunts are in the unsatisfiable core [2021-02-19 19:43:05,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:06,154 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 19:43:06,469 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 19:43:06,678 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 19:43:07,342 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-02-19 19:43:07,904 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 19:43:08,733 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 19:43:09,042 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 19:43:09,999 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-02-19 19:43:10,248 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:43:10,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-02-19 19:43:10,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:43:10,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:43:10,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:43:10,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:110, output treesize:91 [2021-02-19 19:43:10,801 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:43:10,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 22 [2021-02-19 19:43:10,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:43:10,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:43:10,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:43:10,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:75 [2021-02-19 19:43:11,758 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-02-19 19:43:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:43:11,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:11,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:43:12,119 INFO L244 Elim1Store]: Index analysis took 253 ms [2021-02-19 19:43:12,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 25 [2021-02-19 19:43:12,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:43:12,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:43:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:12,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 1 [2021-02-19 19:43:12,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:43:12,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:43:12,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:43:12,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:187, output treesize:19 [2021-02-19 19:43:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:12,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:12,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 38] total 54 [2021-02-19 19:43:12,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823641703] [2021-02-19 19:43:12,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-02-19 19:43:12,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:12,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-02-19 19:43:12,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:43:12,662 INFO L87 Difference]: Start difference. First operand 203 states and 348 transitions. Second operand has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:15,233 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-02-19 19:43:15,547 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-02-19 19:43:15,820 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-02-19 19:43:16,140 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 19:43:16,639 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-02-19 19:43:17,520 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 19:43:17,888 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2021-02-19 19:43:18,143 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-02-19 19:43:18,615 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-02-19 19:43:20,489 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-02-19 19:43:21,319 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 19:43:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:22,385 INFO L93 Difference]: Finished difference Result 442 states and 766 transitions. [2021-02-19 19:43:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-02-19 19:43:22,388 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 19:43:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:22,389 INFO L225 Difference]: With dead ends: 442 [2021-02-19 19:43:22,389 INFO L226 Difference]: Without dead ends: 354 [2021-02-19 19:43:22,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 16 SyntacticMatches, 19 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=905, Invalid=8797, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 19:43:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-02-19 19:43:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 164. [2021-02-19 19:43:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.7730061349693251) internal successors, (289), 163 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 289 transitions. [2021-02-19 19:43:22,392 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 289 transitions. Word has length 51 [2021-02-19 19:43:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:22,392 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 289 transitions. [2021-02-19 19:43:22,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 289 transitions. [2021-02-19 19:43:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:43:22,392 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:22,392 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:22,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-02-19 19:43:22,593 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash 850419833, now seen corresponding path program 53 times [2021-02-19 19:43:22,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:22,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869180834] [2021-02-19 19:43:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:23,440 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 19:43:23,689 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 19:43:24,028 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-02-19 19:43:24,222 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-02-19 19:43:24,423 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-02-19 19:43:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-02-19 19:43:25,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869180834] [2021-02-19 19:43:25,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916753501] [2021-02-19 19:43:25,318 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 [2021-02-19 19:43:25,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:43:25,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:25,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 124 conjunts are in the unsatisfiable core [2021-02-19 19:43:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:26,008 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 19:43:26,513 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-02-19 19:43:28,663 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 19:43:29,899 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-02-19 19:43:30,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:30,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:30,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:30,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:43:30,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:30,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:43:30,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2021-02-19 19:43:30,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:43:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:30,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:43:30,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:43:30,840 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 10 [2021-02-19 19:43:30,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:43:30,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:43:30,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:43:30,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:243, output treesize:88 [2021-02-19 19:43:31,660 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 19:43:31,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 28 [2021-02-19 19:43:31,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:43:31,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:43:31,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:43:31,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:110, output treesize:79 [2021-02-19 19:43:32,435 INFO L354 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2021-02-19 19:43:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 63 treesize of output 25 [2021-02-19 19:43:32,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:43:32,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:43:32,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:43:32,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:81, output treesize:19 [2021-02-19 19:43:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:32,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:32,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 38] total 58 [2021-02-19 19:43:32,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402173574] [2021-02-19 19:43:32,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-02-19 19:43:32,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:32,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-02-19 19:43:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:43:32,939 INFO L87 Difference]: Start difference. First operand 164 states and 289 transitions. Second operand has 59 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 58 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:37,325 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 19:43:37,798 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 19:43:38,566 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-02-19 19:43:38,812 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-02-19 19:43:39,629 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-02-19 19:43:40,925 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-19 19:43:41,396 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 19:43:43,404 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 19:43:43,706 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-02-19 19:43:44,826 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-02-19 19:43:45,171 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-02-19 19:43:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:45,195 INFO L93 Difference]: Finished difference Result 535 states and 1066 transitions. [2021-02-19 19:43:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 19:43:45,198 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 58 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 19:43:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:45,199 INFO L225 Difference]: With dead ends: 535 [2021-02-19 19:43:45,199 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 19:43:45,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 15 SyntacticMatches, 16 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=804, Invalid=8702, Unknown=0, NotChecked=0, Total=9506 [2021-02-19 19:43:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 19:43:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 19:43:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 19:43:45,200 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-02-19 19:43:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:45,200 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 19:43:45,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 58 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 19:43:45,200 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 19:43:45,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-02-19 19:43:45,417 INFO L202 PluginConnector]: Adding new model commit-2-alt-dnh.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:43:45 BasicIcfg [2021-02-19 19:43:45,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:43:45,417 INFO L168 Benchmark]: Toolchain (without parser) took 339672.83 ms. Allocated memory was 255.9 MB in the beginning and 763.4 MB in the end (delta: 507.5 MB). Free memory was 236.3 MB in the beginning and 684.6 MB in the end (delta: -448.3 MB). Peak memory consumption was 62.0 MB. Max. memory is 16.0 GB. [2021-02-19 19:43:45,418 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:43:45,418 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.03 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:43:45,418 INFO L168 Benchmark]: Boogie Preprocessor took 31.68 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:43:45,418 INFO L168 Benchmark]: RCFGBuilder took 452.61 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 227.1 MB in the end (delta: 6.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-02-19 19:43:45,418 INFO L168 Benchmark]: TraceAbstraction took 339153.16 ms. Allocated memory was 255.9 MB in the beginning and 763.4 MB in the end (delta: 507.5 MB). Free memory was 226.6 MB in the beginning and 684.6 MB in the end (delta: -457.9 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.0 GB. [2021-02-19 19:43:45,418 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 0.18 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.03 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 31.68 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 452.61 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 227.1 MB in the end (delta: 6.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 339153.16 ms. Allocated memory was 255.9 MB in the beginning and 763.4 MB in the end (delta: 507.5 MB). Free memory was 226.6 MB in the beginning and 684.6 MB in the end (delta: -457.9 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 339.0s, OverallIterations: 61, TraceHistogramMax: 3, AutomataDifference: 182.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1742 SDtfs, 3326 SDslu, 28372 SDs, 0 SdLazy, 80245 SolverSat, 4164 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4524 GetRequests, 929 SyntacticMatches, 407 SemanticMatches, 3188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69124 ImplicationChecksByTransitivity, 211.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3004occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 61 MinimizatonAttempts, 7534 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 140.6s InterpolantComputationTime, 4122 NumberOfCodeBlocks, 4122 NumberOfCodeBlocksAsserted, 183 NumberOfCheckSat, 4008 ConstructedInterpolants, 174 QuantifiedInterpolants, 3861590 SizeOfPredicates, 362 NumberOfNonLiveVariables, 7757 ConjunctsInSsa, 3844 ConjunctsInUnsatCore, 114 InterpolantComputations, 9 PerfectInterpolantSequences, 353/2046 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...