/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:06:12,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:06:12,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:06:12,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:06:12,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:06:12,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:06:12,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:06:12,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:06:12,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:06:12,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:06:12,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:06:12,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:06:12,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:06:12,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:06:12,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:06:12,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:06:12,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 20:06:12,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:06:12,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:06:12,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:06:12,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:06:12,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:06:12,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:06:12,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:06:12,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:06:12,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:06:12,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:06:12,448 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:06:12,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:06:12,448 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:06:12,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:06:12,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:06:12,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:06:12,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:06:12,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:06:12,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:06:12,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:06:12,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:06:12,449 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:06:12,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:06:12,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:06:12,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:06:12,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:06:12,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:06:12,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:06:12,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:06:12,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:06:12,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:06:12,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:06:12,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:06:12,450 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:06:12,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:06:12,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:06:12,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:06:12,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:06:12,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:06:12,754 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:06:12,757 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:06:12,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2021-07-13 20:06:12,758 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2021-07-13 20:06:12,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:06:12,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:06:12,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:06:12,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:06:12,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:06:12,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... [2021-07-13 20:06:12,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... [2021-07-13 20:06:12,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:06:12,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:06:12,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:06:12,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:06:12,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... [2021-07-13 20:06:12,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... [2021-07-13 20:06:12,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... [2021-07-13 20:06:12,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... [2021-07-13 20:06:12,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... [2021-07-13 20:06:12,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... [2021-07-13 20:06:12,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... [2021-07-13 20:06:12,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:06:12,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:06:12,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:06:12,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:06:12,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:06:12,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:06:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:06:12,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:06:12,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:06:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:06:12,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:06:12,886 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:06:12,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:06:12,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:06:12,886 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:06:12,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:06:12,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:06:12,887 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:06:13,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:06:13,041 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:06:13,042 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:06:13 BoogieIcfgContainer [2021-07-13 20:06:13,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:06:13,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:06:13,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:06:13,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:06:13,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:12" (1/2) ... [2021-07-13 20:06:13,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c96a66 and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:06:13, skipping insertion in model container [2021-07-13 20:06:13,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:06:13" (2/2) ... [2021-07-13 20:06:13,047 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2021-07-13 20:06:13,051 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:06:13,052 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:06:13,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:06:13,081 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:06:13,110 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:06:13,129 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:06:13,143 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:06:13,143 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:06:13,143 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:06:13,143 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:06:13,143 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:06:13,143 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:06:13,143 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:06:13,143 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:06:13,153 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2021-07-13 20:06:13,171 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:06:13,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:13,183 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:13,183 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash 33215059, now seen corresponding path program 1 times [2021-07-13 20:06:13,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:13,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263283995] [2021-07-13 20:06:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:13,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:13,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263283995] [2021-07-13 20:06:13,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263283995] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:13,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:13,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:06:13,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253632416] [2021-07-13 20:06:13,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:13,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:13,382 INFO L87 Difference]: Start difference. First operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:13,461 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2021-07-13 20:06:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:13,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:06:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:13,478 INFO L225 Difference]: With dead ends: 172 [2021-07-13 20:06:13,478 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 20:06:13,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:13,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 20:06:13,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-07-13 20:06:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2021-07-13 20:06:13,524 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2021-07-13 20:06:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:13,524 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2021-07-13 20:06:13,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2021-07-13 20:06:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:06:13,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:13,526 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:13,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:06:13,527 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash 627872769, now seen corresponding path program 2 times [2021-07-13 20:06:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:13,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049942312] [2021-07-13 20:06:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:13,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:13,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049942312] [2021-07-13 20:06:13,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049942312] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:13,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:13,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:06:13,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506210527] [2021-07-13 20:06:13,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:06:13,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:13,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:06:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:06:13,599 INFO L87 Difference]: Start difference. First operand 109 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:13,668 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2021-07-13 20:06:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:06:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:06:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:13,673 INFO L225 Difference]: With dead ends: 190 [2021-07-13 20:06:13,674 INFO L226 Difference]: Without dead ends: 142 [2021-07-13 20:06:13,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:13,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-13 20:06:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-07-13 20:06:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 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) [2021-07-13 20:06:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2021-07-13 20:06:13,701 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2021-07-13 20:06:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:13,701 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2021-07-13 20:06:13,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2021-07-13 20:06:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:06:13,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:13,705 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:13,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:06:13,706 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash -189898910, now seen corresponding path program 1 times [2021-07-13 20:06:13,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:13,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369504763] [2021-07-13 20:06:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:13,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:13,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369504763] [2021-07-13 20:06:13,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369504763] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:13,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:13,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:06:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822025828] [2021-07-13 20:06:13,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:13,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:13,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:13,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:13,759 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:13,768 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2021-07-13 20:06:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:13,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:06:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:13,769 INFO L225 Difference]: With dead ends: 164 [2021-07-13 20:06:13,769 INFO L226 Difference]: Without dead ends: 152 [2021-07-13 20:06:13,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-13 20:06:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-07-13 20:06:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2021-07-13 20:06:13,775 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2021-07-13 20:06:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:13,775 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2021-07-13 20:06:13,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2021-07-13 20:06:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:13,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:13,776 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:13,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:06:13,776 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash -480736564, now seen corresponding path program 1 times [2021-07-13 20:06:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:13,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793365165] [2021-07-13 20:06:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:13,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:13,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793365165] [2021-07-13 20:06:13,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793365165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:13,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153443964] [2021-07-13 20:06:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:06:13,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:14,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:14,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:14,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:14,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:14,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-07-13 20:06:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:14,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153443964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:14,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:14,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:06:14,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522881386] [2021-07-13 20:06:14,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:06:14,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:14,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:06:14,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:06:14,331 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:14,569 INFO L93 Difference]: Finished difference Result 302 states and 708 transitions. [2021-07-13 20:06:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:06:14,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:14,571 INFO L225 Difference]: With dead ends: 302 [2021-07-13 20:06:14,571 INFO L226 Difference]: Without dead ends: 218 [2021-07-13 20:06:14,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-13 20:06:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2021-07-13 20:06:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2021-07-13 20:06:14,587 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2021-07-13 20:06:14,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:14,587 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2021-07-13 20:06:14,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2021-07-13 20:06:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:06:14,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:14,589 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:14,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:14,807 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:14,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:14,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1527967927, now seen corresponding path program 2 times [2021-07-13 20:06:14,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:14,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119189330] [2021-07-13 20:06:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:14,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:14,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119189330] [2021-07-13 20:06:14,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119189330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:14,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471405063] [2021-07-13 20:06:14,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:14,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:14,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:06:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:15,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471405063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:15,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:15,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:06:15,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941360050] [2021-07-13 20:06:15,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:06:15,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:15,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:06:15,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:06:15,003 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:15,017 INFO L93 Difference]: Finished difference Result 496 states and 1143 transitions. [2021-07-13 20:06:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:06:15,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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 28 [2021-07-13 20:06:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:15,021 INFO L225 Difference]: With dead ends: 496 [2021-07-13 20:06:15,021 INFO L226 Difference]: Without dead ends: 454 [2021-07-13 20:06:15,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:06:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-13 20:06:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2021-07-13 20:06:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2021-07-13 20:06:15,042 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2021-07-13 20:06:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:15,042 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2021-07-13 20:06:15,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2021-07-13 20:06:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:15,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:15,044 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:15,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:15,253 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:15,253 INFO L82 PathProgramCache]: Analyzing trace with hash 703493603, now seen corresponding path program 3 times [2021-07-13 20:06:15,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:15,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406879724] [2021-07-13 20:06:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:15,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:15,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406879724] [2021-07-13 20:06:15,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406879724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:15,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343781936] [2021-07-13 20:06:15,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:15,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:06:15,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:15,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:06:15,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:15,746 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:15,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:06:15,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:15,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:15,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:15,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:15,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343781936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:15,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:15,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:06:15,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769080469] [2021-07-13 20:06:15,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:15,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:15,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:15,824 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:18,231 INFO L93 Difference]: Finished difference Result 1720 states and 4262 transitions. [2021-07-13 20:06:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:06:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:18,237 INFO L225 Difference]: With dead ends: 1720 [2021-07-13 20:06:18,237 INFO L226 Difference]: Without dead ends: 1181 [2021-07-13 20:06:18,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1911.7ms TimeCoverageRelationStatistics Valid=1330, Invalid=5642, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:06:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-07-13 20:06:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 409. [2021-07-13 20:06:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.4534313725490198) internal successors, (1001), 408 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1001 transitions. [2021-07-13 20:06:18,258 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1001 transitions. Word has length 31 [2021-07-13 20:06:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:18,258 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1001 transitions. [2021-07-13 20:06:18,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1001 transitions. [2021-07-13 20:06:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:18,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:18,263 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:18,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:18,477 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:18,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1642327051, now seen corresponding path program 4 times [2021-07-13 20:06:18,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:18,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342783132] [2021-07-13 20:06:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:18,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:18,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342783132] [2021-07-13 20:06:18,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342783132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:18,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701942046] [2021-07-13 20:06:18,700 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 [2021-07-13 20:06:18,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:06:18,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:18,955 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:18,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:06:18,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:18,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:18,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:18,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:19,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701942046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:19,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:19,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:06:19,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100322798] [2021-07-13 20:06:19,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:19,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:19,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:19,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:19,030 INFO L87 Difference]: Start difference. First operand 409 states and 1001 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:20,881 INFO L93 Difference]: Finished difference Result 1293 states and 3137 transitions. [2021-07-13 20:06:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:06:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:20,885 INFO L225 Difference]: With dead ends: 1293 [2021-07-13 20:06:20,885 INFO L226 Difference]: Without dead ends: 1200 [2021-07-13 20:06:20,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1548.8ms TimeCoverageRelationStatistics Valid=1047, Invalid=4065, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:06:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-07-13 20:06:20,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 413. [2021-07-13 20:06:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.4490291262135924) internal successors, (1009), 412 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1009 transitions. [2021-07-13 20:06:20,897 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1009 transitions. Word has length 31 [2021-07-13 20:06:20,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:20,897 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1009 transitions. [2021-07-13 20:06:20,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1009 transitions. [2021-07-13 20:06:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:20,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:20,898 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:21,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:21,116 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1488152547, now seen corresponding path program 5 times [2021-07-13 20:06:21,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:21,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193072379] [2021-07-13 20:06:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:21,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:21,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193072379] [2021-07-13 20:06:21,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193072379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626856969] [2021-07-13 20:06:21,326 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 [2021-07-13 20:06:21,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:06:21,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:06:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:21,587 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:21,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:06:21,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:21,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:21,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:21,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:21,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626856969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:21,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:06:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651863979] [2021-07-13 20:06:21,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:21,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:21,668 INFO L87 Difference]: Start difference. First operand 413 states and 1009 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:24,327 INFO L93 Difference]: Finished difference Result 3428 states and 8347 transitions. [2021-07-13 20:06:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:06:24,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:24,339 INFO L225 Difference]: With dead ends: 3428 [2021-07-13 20:06:24,339 INFO L226 Difference]: Without dead ends: 2445 [2021-07-13 20:06:24,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 2171.0ms TimeCoverageRelationStatistics Valid=1636, Invalid=7106, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:06:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-07-13 20:06:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 445. [2021-07-13 20:06:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.463963963963964) internal successors, (1094), 444 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1094 transitions. [2021-07-13 20:06:24,367 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1094 transitions. Word has length 31 [2021-07-13 20:06:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:24,367 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1094 transitions. [2021-07-13 20:06:24,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1094 transitions. [2021-07-13 20:06:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:24,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:24,369 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:24,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:06:24,582 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:24,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1925512583, now seen corresponding path program 6 times [2021-07-13 20:06:24,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:24,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100025896] [2021-07-13 20:06:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:24,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:24,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100025896] [2021-07-13 20:06:24,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100025896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:24,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722625250] [2021-07-13 20:06:24,744 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 [2021-07-13 20:06:24,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:06:24,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:06:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:24,985 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:24,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:06:24,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:24,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:24,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:24,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:25,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722625250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:25,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:25,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:06:25,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107173656] [2021-07-13 20:06:25,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:25,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:25,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:25,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:25,047 INFO L87 Difference]: Start difference. First operand 445 states and 1094 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:27,424 INFO L93 Difference]: Finished difference Result 2497 states and 6083 transitions. [2021-07-13 20:06:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:06:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:27,434 INFO L225 Difference]: With dead ends: 2497 [2021-07-13 20:06:27,434 INFO L226 Difference]: Without dead ends: 2112 [2021-07-13 20:06:27,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 2037.1ms TimeCoverageRelationStatistics Valid=1578, Invalid=6978, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:06:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-07-13 20:06:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 573. [2021-07-13 20:06:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.4737762237762237) internal successors, (1415), 572 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1415 transitions. [2021-07-13 20:06:27,460 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1415 transitions. Word has length 31 [2021-07-13 20:06:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:27,460 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1415 transitions. [2021-07-13 20:06:27,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1415 transitions. [2021-07-13 20:06:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:27,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:27,462 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:27,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:06:27,679 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash -879696673, now seen corresponding path program 7 times [2021-07-13 20:06:27,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:27,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553816941] [2021-07-13 20:06:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:27,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:27,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553816941] [2021-07-13 20:06:27,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553816941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:27,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446036987] [2021-07-13 20:06:27,841 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 [2021-07-13 20:06:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:27,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:06:27,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:28,081 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:28,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:06:28,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:28,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:28,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:28,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:28,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446036987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:28,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:28,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:06:28,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749594913] [2021-07-13 20:06:28,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:28,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:28,199 INFO L87 Difference]: Start difference. First operand 573 states and 1415 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:29,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:29,888 INFO L93 Difference]: Finished difference Result 2289 states and 5693 transitions. [2021-07-13 20:06:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:06:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:29,894 INFO L225 Difference]: With dead ends: 2289 [2021-07-13 20:06:29,894 INFO L226 Difference]: Without dead ends: 1584 [2021-07-13 20:06:29,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1496.9ms TimeCoverageRelationStatistics Valid=1152, Invalid=4854, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:06:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-07-13 20:06:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 605. [2021-07-13 20:06:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.468543046357616) internal successors, (1491), 604 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1491 transitions. [2021-07-13 20:06:29,909 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1491 transitions. Word has length 31 [2021-07-13 20:06:29,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:29,910 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1491 transitions. [2021-07-13 20:06:29,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1491 transitions. [2021-07-13 20:06:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:29,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:29,911 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:30,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:30,119 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash 320665773, now seen corresponding path program 8 times [2021-07-13 20:06:30,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:30,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92268479] [2021-07-13 20:06:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:30,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:30,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92268479] [2021-07-13 20:06:30,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92268479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:30,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274294593] [2021-07-13 20:06:30,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:30,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:30,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:06:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:30,510 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:30,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:06:30,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:30,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:30,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:30,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:30,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274294593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:30,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:30,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:06:30,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600678745] [2021-07-13 20:06:30,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:30,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:30,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:30,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:30,561 INFO L87 Difference]: Start difference. First operand 605 states and 1491 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:32,051 INFO L93 Difference]: Finished difference Result 2332 states and 5648 transitions. [2021-07-13 20:06:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:06:32,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:32,058 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 20:06:32,058 INFO L226 Difference]: Without dead ends: 1883 [2021-07-13 20:06:32,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1282.1ms TimeCoverageRelationStatistics Valid=1008, Invalid=4248, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:06:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-07-13 20:06:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 643. [2021-07-13 20:06:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.454828660436137) internal successors, (1576), 642 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1576 transitions. [2021-07-13 20:06:32,073 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1576 transitions. Word has length 31 [2021-07-13 20:06:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:32,073 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1576 transitions. [2021-07-13 20:06:32,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1576 transitions. [2021-07-13 20:06:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:06:32,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:32,075 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:32,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:06:32,280 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:32,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2067503680, now seen corresponding path program 9 times [2021-07-13 20:06:32,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:32,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143162238] [2021-07-13 20:06:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:32,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:32,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143162238] [2021-07-13 20:06:32,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143162238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:32,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709028142] [2021-07-13 20:06:32,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:32,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:06:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:06:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:32,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709028142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:32,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:32,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:06:32,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841650305] [2021-07-13 20:06:32,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:06:32,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:32,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:06:32,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:06:32,392 INFO L87 Difference]: Start difference. First operand 643 states and 1576 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:32,403 INFO L93 Difference]: Finished difference Result 1162 states and 2791 transitions. [2021-07-13 20:06:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:06:32,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:06:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:32,407 INFO L225 Difference]: With dead ends: 1162 [2021-07-13 20:06:32,407 INFO L226 Difference]: Without dead ends: 1105 [2021-07-13 20:06:32,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:06:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-07-13 20:06:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 768. [2021-07-13 20:06:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.4771838331160363) internal successors, (1900), 767 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1900 transitions. [2021-07-13 20:06:32,420 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1900 transitions. Word has length 34 [2021-07-13 20:06:32,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:32,420 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 1900 transitions. [2021-07-13 20:06:32,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1900 transitions. [2021-07-13 20:06:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:06:32,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:32,421 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:32,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:06:32,631 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:32,631 INFO L82 PathProgramCache]: Analyzing trace with hash 774999660, now seen corresponding path program 10 times [2021-07-13 20:06:32,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:32,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059517670] [2021-07-13 20:06:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:32,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:32,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059517670] [2021-07-13 20:06:32,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059517670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:32,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744094617] [2021-07-13 20:06:32,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:32,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:06:32,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:33,253 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:06:33,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:06:33,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:33,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:33,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:33,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:06:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:33,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744094617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:33,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:33,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-13 20:06:33,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381390710] [2021-07-13 20:06:33,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:06:33,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:33,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:06:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:06:33,337 INFO L87 Difference]: Start difference. First operand 768 states and 1900 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:37,706 INFO L93 Difference]: Finished difference Result 4022 states and 9925 transitions. [2021-07-13 20:06:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 20:06:37,706 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:06:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:37,717 INFO L225 Difference]: With dead ends: 4022 [2021-07-13 20:06:37,717 INFO L226 Difference]: Without dead ends: 3406 [2021-07-13 20:06:37,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 3452.4ms TimeCoverageRelationStatistics Valid=2702, Invalid=15120, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 20:06:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2021-07-13 20:06:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 917. [2021-07-13 20:06:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.5010917030567685) internal successors, (2291), 916 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2291 transitions. [2021-07-13 20:06:37,742 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2291 transitions. Word has length 37 [2021-07-13 20:06:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:37,743 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2291 transitions. [2021-07-13 20:06:37,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2291 transitions. [2021-07-13 20:06:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:06:37,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:37,744 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:37,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:06:37,961 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1677954198, now seen corresponding path program 11 times [2021-07-13 20:06:37,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:37,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723957978] [2021-07-13 20:06:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:38,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:38,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723957978] [2021-07-13 20:06:38,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723957978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:38,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457710294] [2021-07-13 20:06:38,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:38,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:06:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:06:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:38,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:06:38,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:38,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:38,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:38,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:38,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:06:38,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:06:38,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:06:38,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:38,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:38,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:38,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-07-13 20:06:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:38,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457710294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:38,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:38,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-13 20:06:38,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071659592] [2021-07-13 20:06:38,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:06:38,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:38,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:06:38,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:06:38,725 INFO L87 Difference]: Start difference. First operand 917 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:44,221 INFO L93 Difference]: Finished difference Result 6772 states and 16848 transitions. [2021-07-13 20:06:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-07-13 20:06:44,222 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:06:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:44,237 INFO L225 Difference]: With dead ends: 6772 [2021-07-13 20:06:44,238 INFO L226 Difference]: Without dead ends: 5574 [2021-07-13 20:06:44,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 4436.2ms TimeCoverageRelationStatistics Valid=3398, Invalid=18064, Unknown=0, NotChecked=0, Total=21462 [2021-07-13 20:06:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2021-07-13 20:06:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 1099. [2021-07-13 20:06:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 2.517304189435337) internal successors, (2764), 1098 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 2764 transitions. [2021-07-13 20:06:44,289 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 2764 transitions. Word has length 37 [2021-07-13 20:06:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:44,289 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 2764 transitions. [2021-07-13 20:06:44,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 2764 transitions. [2021-07-13 20:06:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:06:44,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:44,291 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:44,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:44,505 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:44,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1793916204, now seen corresponding path program 12 times [2021-07-13 20:06:44,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:44,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829779761] [2021-07-13 20:06:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:44,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:44,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829779761] [2021-07-13 20:06:44,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829779761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:44,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932649032] [2021-07-13 20:06:44,730 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 [2021-07-13 20:06:44,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:06:44,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:44,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:06:44,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:45,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:45,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:06:45,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:45,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:45,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:06:45,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-07-13 20:06:45,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:45,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:45,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:45,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:10 [2021-07-13 20:06:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:45,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932649032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:45,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:45,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-13 20:06:45,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279100279] [2021-07-13 20:06:45,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:06:45,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:06:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:06:45,411 INFO L87 Difference]: Start difference. First operand 1099 states and 2764 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:50,663 INFO L93 Difference]: Finished difference Result 5656 states and 14216 transitions. [2021-07-13 20:06:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-13 20:06:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:06:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:50,683 INFO L225 Difference]: With dead ends: 5656 [2021-07-13 20:06:50,683 INFO L226 Difference]: Without dead ends: 5239 [2021-07-13 20:06:50,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6607 ImplicationChecksByTransitivity, 4195.1ms TimeCoverageRelationStatistics Valid=2865, Invalid=16595, Unknown=0, NotChecked=0, Total=19460 [2021-07-13 20:06:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2021-07-13 20:06:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 1221. [2021-07-13 20:06:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.533606557377049) internal successors, (3091), 1220 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3091 transitions. [2021-07-13 20:06:50,716 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3091 transitions. Word has length 37 [2021-07-13 20:06:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:50,716 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3091 transitions. [2021-07-13 20:06:50,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3091 transitions. [2021-07-13 20:06:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:06:50,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:50,719 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:50,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:50,932 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1799631944, now seen corresponding path program 13 times [2021-07-13 20:06:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:50,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731890247] [2021-07-13 20:06:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:51,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:51,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731890247] [2021-07-13 20:06:51,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731890247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:51,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956719692] [2021-07-13 20:06:51,119 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 [2021-07-13 20:06:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:51,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:06:51,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:51,500 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:06:51,501 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 38 treesize of output 18 [2021-07-13 20:06:51,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:51,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:51,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:51,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:06:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:51,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956719692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:51,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:51,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-07-13 20:06:51,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215194538] [2021-07-13 20:06:51,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:06:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:51,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:06:51,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:06:51,569 INFO L87 Difference]: Start difference. First operand 1221 states and 3091 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:56,796 INFO L93 Difference]: Finished difference Result 7387 states and 18497 transitions. [2021-07-13 20:06:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-07-13 20:06:56,796 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:06:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:56,808 INFO L225 Difference]: With dead ends: 7387 [2021-07-13 20:06:56,808 INFO L226 Difference]: Without dead ends: 6259 [2021-07-13 20:06:56,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8391 ImplicationChecksByTransitivity, 4183.4ms TimeCoverageRelationStatistics Valid=3701, Invalid=18649, Unknown=0, NotChecked=0, Total=22350 [2021-07-13 20:06:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2021-07-13 20:06:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 1453. [2021-07-13 20:06:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 2.548898071625344) internal successors, (3701), 1452 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 3701 transitions. [2021-07-13 20:06:56,853 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 3701 transitions. Word has length 37 [2021-07-13 20:06:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:56,853 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 3701 transitions. [2021-07-13 20:06:56,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 3701 transitions. [2021-07-13 20:06:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:06:56,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:56,855 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:57,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:06:57,061 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:57,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1710676408, now seen corresponding path program 14 times [2021-07-13 20:06:57,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:57,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996516013] [2021-07-13 20:06:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:57,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:57,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996516013] [2021-07-13 20:06:57,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996516013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:57,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509689699] [2021-07-13 20:06:57,258 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 [2021-07-13 20:06:57,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:57,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:06:57,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:57,639 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:06:57,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:06:57,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:57,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:57,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:57,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:06:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:57,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509689699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:57,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:57,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-07-13 20:06:57,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876596153] [2021-07-13 20:06:57,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:06:57,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:57,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:06:57,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:06:57,706 INFO L87 Difference]: Start difference. First operand 1453 states and 3701 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:02,824 INFO L93 Difference]: Finished difference Result 9364 states and 23545 transitions. [2021-07-13 20:07:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-07-13 20:07:02,825 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:02,840 INFO L225 Difference]: With dead ends: 9364 [2021-07-13 20:07:02,840 INFO L226 Difference]: Without dead ends: 8006 [2021-07-13 20:07:02,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 4184.7ms TimeCoverageRelationStatistics Valid=3731, Invalid=21709, Unknown=0, NotChecked=0, Total=25440 [2021-07-13 20:07:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2021-07-13 20:07:02,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 2053. [2021-07-13 20:07:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.574561403508772) internal successors, (5283), 2052 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5283 transitions. [2021-07-13 20:07:02,910 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5283 transitions. Word has length 37 [2021-07-13 20:07:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:02,910 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5283 transitions. [2021-07-13 20:07:02,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5283 transitions. [2021-07-13 20:07:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:07:02,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:02,914 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:03,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:03,124 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1273316372, now seen corresponding path program 15 times [2021-07-13 20:07:03,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:03,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876918603] [2021-07-13 20:07:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:03,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:03,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876918603] [2021-07-13 20:07:03,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876918603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:03,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062686789] [2021-07-13 20:07:03,328 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 [2021-07-13 20:07:03,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:07:03,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:07:03,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:03,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:03,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:03,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:07:03,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:03,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:03,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:03,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-07-13 20:07:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:03,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062686789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:03,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:03,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-07-13 20:07:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050869779] [2021-07-13 20:07:03,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:03,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:03,821 INFO L87 Difference]: Start difference. First operand 2053 states and 5283 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:07,786 INFO L93 Difference]: Finished difference Result 8726 states and 22162 transitions. [2021-07-13 20:07:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-13 20:07:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:07,798 INFO L225 Difference]: With dead ends: 8726 [2021-07-13 20:07:07,798 INFO L226 Difference]: Without dead ends: 7790 [2021-07-13 20:07:07,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6527 ImplicationChecksByTransitivity, 3264.6ms TimeCoverageRelationStatistics Valid=2541, Invalid=15015, Unknown=0, NotChecked=0, Total=17556 [2021-07-13 20:07:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-07-13 20:07:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 2539. [2021-07-13 20:07:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2538 states have (on average 2.602442868400315) internal successors, (6605), 2538 states have internal predecessors, (6605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 6605 transitions. [2021-07-13 20:07:07,863 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 6605 transitions. Word has length 37 [2021-07-13 20:07:07,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:07,863 INFO L482 AbstractCegarLoop]: Abstraction has 2539 states and 6605 transitions. [2021-07-13 20:07:07,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:07,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 6605 transitions. [2021-07-13 20:07:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:07:07,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:07,867 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:08,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:08,084 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:08,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1801064030, now seen corresponding path program 16 times [2021-07-13 20:07:08,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:08,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193523419] [2021-07-13 20:07:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:08,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:08,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193523419] [2021-07-13 20:07:08,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193523419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:08,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324339457] [2021-07-13 20:07:08,332 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 [2021-07-13 20:07:08,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:08,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:08,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:07:08,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:08,721 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:07:08,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:07:08,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:08,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:08,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:08,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:07:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:08,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324339457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:08,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:08,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-07-13 20:07:08,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300847519] [2021-07-13 20:07:08,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:08,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:08,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:08,795 INFO L87 Difference]: Start difference. First operand 2539 states and 6605 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:12,896 INFO L93 Difference]: Finished difference Result 9458 states and 24261 transitions. [2021-07-13 20:07:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-13 20:07:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:12,910 INFO L225 Difference]: With dead ends: 9458 [2021-07-13 20:07:12,910 INFO L226 Difference]: Without dead ends: 8487 [2021-07-13 20:07:12,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6032 ImplicationChecksByTransitivity, 3369.4ms TimeCoverageRelationStatistics Valid=2478, Invalid=14552, Unknown=0, NotChecked=0, Total=17030 [2021-07-13 20:07:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8487 states. [2021-07-13 20:07:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8487 to 2847. [2021-07-13 20:07:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.600843288826423) internal successors, (7402), 2846 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7402 transitions. [2021-07-13 20:07:12,981 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7402 transitions. Word has length 37 [2021-07-13 20:07:12,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:12,981 INFO L482 AbstractCegarLoop]: Abstraction has 2847 states and 7402 transitions. [2021-07-13 20:07:12,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:12,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7402 transitions. [2021-07-13 20:07:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:07:12,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:12,986 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:13,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:13,201 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1293540820, now seen corresponding path program 17 times [2021-07-13 20:07:13,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:13,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794983371] [2021-07-13 20:07:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:13,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:13,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794983371] [2021-07-13 20:07:13,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794983371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:13,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107188285] [2021-07-13 20:07:13,404 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 [2021-07-13 20:07:13,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:07:13,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:13,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:07:13,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:13,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:13,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:13,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:13,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2021-07-13 20:07:13,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:13,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:13,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:13,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:55, output treesize:10 [2021-07-13 20:07:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:14,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107188285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:14,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:14,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-07-13 20:07:14,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537757247] [2021-07-13 20:07:14,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:14,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:14,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:14,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:14,046 INFO L87 Difference]: Start difference. First operand 2847 states and 7402 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:18,041 INFO L93 Difference]: Finished difference Result 9180 states and 23382 transitions. [2021-07-13 20:07:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-13 20:07:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:18,056 INFO L225 Difference]: With dead ends: 9180 [2021-07-13 20:07:18,056 INFO L226 Difference]: Without dead ends: 8400 [2021-07-13 20:07:18,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 2991.3ms TimeCoverageRelationStatistics Valid=2057, Invalid=12463, Unknown=0, NotChecked=0, Total=14520 [2021-07-13 20:07:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8400 states. [2021-07-13 20:07:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8400 to 3079. [2021-07-13 20:07:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.602014294996751) internal successors, (8009), 3078 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8009 transitions. [2021-07-13 20:07:18,133 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8009 transitions. Word has length 37 [2021-07-13 20:07:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:18,133 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8009 transitions. [2021-07-13 20:07:18,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8009 transitions. [2021-07-13 20:07:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:07:18,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:18,138 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:18,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:07:18,353 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1590603224, now seen corresponding path program 18 times [2021-07-13 20:07:18,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:18,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458967338] [2021-07-13 20:07:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:18,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458967338] [2021-07-13 20:07:18,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458967338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263564388] [2021-07-13 20:07:18,598 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 [2021-07-13 20:07:18,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:07:18,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:07:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:18,973 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:07:18,973 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 38 treesize of output 18 [2021-07-13 20:07:18,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:18,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:07:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263564388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:19,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-13 20:07:19,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686898118] [2021-07-13 20:07:19,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:07:19,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:07:19,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:07:19,044 INFO L87 Difference]: Start difference. First operand 3079 states and 8009 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:22,403 INFO L93 Difference]: Finished difference Result 9460 states and 24220 transitions. [2021-07-13 20:07:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-13 20:07:22,404 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:22,415 INFO L225 Difference]: With dead ends: 9460 [2021-07-13 20:07:22,415 INFO L226 Difference]: Without dead ends: 8811 [2021-07-13 20:07:22,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4494 ImplicationChecksByTransitivity, 3043.1ms TimeCoverageRelationStatistics Valid=2347, Invalid=10993, Unknown=0, NotChecked=0, Total=13340 [2021-07-13 20:07:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8811 states. [2021-07-13 20:07:22,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8811 to 3651. [2021-07-13 20:07:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3650 states have (on average 2.5695890410958904) internal successors, (9379), 3650 states have internal predecessors, (9379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 9379 transitions. [2021-07-13 20:07:22,493 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 9379 transitions. Word has length 37 [2021-07-13 20:07:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:22,493 INFO L482 AbstractCegarLoop]: Abstraction has 3651 states and 9379 transitions. [2021-07-13 20:07:22,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 9379 transitions. [2021-07-13 20:07:22,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:07:22,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:22,499 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:22,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-13 20:07:22,715 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:22,715 INFO L82 PathProgramCache]: Analyzing trace with hash 49497584, now seen corresponding path program 19 times [2021-07-13 20:07:22,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:22,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602112711] [2021-07-13 20:07:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:22,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:22,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602112711] [2021-07-13 20:07:22,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602112711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:22,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587437412] [2021-07-13 20:07:22,908 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 [2021-07-13 20:07:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:22,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:07:22,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:23,309 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:07:23,310 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 38 treesize of output 18 [2021-07-13 20:07:23,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:23,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:07:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:23,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587437412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:23,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:23,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-13 20:07:23,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976158440] [2021-07-13 20:07:23,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:07:23,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:23,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:07:23,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:07:23,378 INFO L87 Difference]: Start difference. First operand 3651 states and 9379 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:26,127 INFO L93 Difference]: Finished difference Result 9814 states and 24985 transitions. [2021-07-13 20:07:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:07:26,127 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:26,141 INFO L225 Difference]: With dead ends: 9814 [2021-07-13 20:07:26,141 INFO L226 Difference]: Without dead ends: 9455 [2021-07-13 20:07:26,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 2431.5ms TimeCoverageRelationStatistics Valid=1922, Invalid=10068, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:07:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-07-13 20:07:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 3907. [2021-07-13 20:07:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 2.5629800307219663) internal successors, (10011), 3906 states have internal predecessors, (10011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 10011 transitions. [2021-07-13 20:07:26,222 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 10011 transitions. Word has length 37 [2021-07-13 20:07:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:26,222 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 10011 transitions. [2021-07-13 20:07:26,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 10011 transitions. [2021-07-13 20:07:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:07:26,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:26,229 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:26,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:26,441 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:26,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:26,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1285155348, now seen corresponding path program 20 times [2021-07-13 20:07:26,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:26,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483311000] [2021-07-13 20:07:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:26,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:26,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483311000] [2021-07-13 20:07:26,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483311000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:26,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966176340] [2021-07-13 20:07:26,613 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 [2021-07-13 20:07:26,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:26,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:26,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:07:26,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:26,971 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:07:26,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:07:26,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:26,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:07:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:27,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966176340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:27,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:27,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-13 20:07:27,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621801056] [2021-07-13 20:07:27,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:07:27,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:27,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:07:27,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:07:27,034 INFO L87 Difference]: Start difference. First operand 3907 states and 10011 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:30,524 INFO L93 Difference]: Finished difference Result 9734 states and 24667 transitions. [2021-07-13 20:07:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:07:30,524 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:30,538 INFO L225 Difference]: With dead ends: 9734 [2021-07-13 20:07:30,538 INFO L226 Difference]: Without dead ends: 9251 [2021-07-13 20:07:30,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4463 ImplicationChecksByTransitivity, 2877.1ms TimeCoverageRelationStatistics Valid=2117, Invalid=11455, Unknown=0, NotChecked=0, Total=13572 [2021-07-13 20:07:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9251 states. [2021-07-13 20:07:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9251 to 4183. [2021-07-13 20:07:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.5516499282639886) internal successors, (10671), 4182 states have internal predecessors, (10671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 10671 transitions. [2021-07-13 20:07:30,618 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 10671 transitions. Word has length 37 [2021-07-13 20:07:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:30,618 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 10671 transitions. [2021-07-13 20:07:30,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 10671 transitions. [2021-07-13 20:07:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:07:30,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:30,625 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:30,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:07:30,830 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:30,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1568060888, now seen corresponding path program 21 times [2021-07-13 20:07:30,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:30,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552012486] [2021-07-13 20:07:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:31,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:31,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552012486] [2021-07-13 20:07:31,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552012486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:31,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421530278] [2021-07-13 20:07:31,001 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 [2021-07-13 20:07:31,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:07:31,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:31,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:07:31,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:31,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-07-13 20:07:31,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:31,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:31,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:31,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:10 [2021-07-13 20:07:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:31,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421530278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:31,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:31,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-07-13 20:07:31,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323932607] [2021-07-13 20:07:31,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:07:31,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:31,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:07:31,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:07:31,579 INFO L87 Difference]: Start difference. First operand 4183 states and 10671 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:35,213 INFO L93 Difference]: Finished difference Result 10750 states and 26972 transitions. [2021-07-13 20:07:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:07:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:35,228 INFO L225 Difference]: With dead ends: 10750 [2021-07-13 20:07:35,228 INFO L226 Difference]: Without dead ends: 9874 [2021-07-13 20:07:35,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2868.1ms TimeCoverageRelationStatistics Valid=1896, Invalid=9660, Unknown=0, NotChecked=0, Total=11556 [2021-07-13 20:07:35,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-07-13 20:07:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 4281. [2021-07-13 20:07:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 2.549299065420561) internal successors, (10911), 4280 states have internal predecessors, (10911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 10911 transitions. [2021-07-13 20:07:35,322 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 10911 transitions. Word has length 37 [2021-07-13 20:07:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:35,322 INFO L482 AbstractCegarLoop]: Abstraction has 4281 states and 10911 transitions. [2021-07-13 20:07:35,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 10911 transitions. [2021-07-13 20:07:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:07:35,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:35,328 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:35,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:07:35,544 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash -62441724, now seen corresponding path program 22 times [2021-07-13 20:07:35,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:35,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272490443] [2021-07-13 20:07:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:07:35,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272490443] [2021-07-13 20:07:35,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272490443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044363928] [2021-07-13 20:07:35,720 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 [2021-07-13 20:07:35,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:35,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:35,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:07:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:36,102 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:07:36,102 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 38 treesize of output 18 [2021-07-13 20:07:36,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:36,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:36,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:36,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:07:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:36,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044363928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:36,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:36,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-07-13 20:07:36,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773850202] [2021-07-13 20:07:36,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:36,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:36,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:36,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:36,191 INFO L87 Difference]: Start difference. First operand 4281 states and 10911 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:40,335 INFO L93 Difference]: Finished difference Result 13721 states and 34563 transitions. [2021-07-13 20:07:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:07:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:40,359 INFO L225 Difference]: With dead ends: 13721 [2021-07-13 20:07:40,359 INFO L226 Difference]: Without dead ends: 13099 [2021-07-13 20:07:40,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5620 ImplicationChecksByTransitivity, 3377.0ms TimeCoverageRelationStatistics Valid=2290, Invalid=13460, Unknown=0, NotChecked=0, Total=15750 [2021-07-13 20:07:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13099 states. [2021-07-13 20:07:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13099 to 4423. [2021-07-13 20:07:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.545002261420172) internal successors, (11254), 4422 states have internal predecessors, (11254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11254 transitions. [2021-07-13 20:07:40,532 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11254 transitions. Word has length 37 [2021-07-13 20:07:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:40,532 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11254 transitions. [2021-07-13 20:07:40,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11254 transitions. [2021-07-13 20:07:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:07:40,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:40,540 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:40,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:40,751 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:40,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:40,751 INFO L82 PathProgramCache]: Analyzing trace with hash 722217220, now seen corresponding path program 23 times [2021-07-13 20:07:40,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:40,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131348207] [2021-07-13 20:07:40,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:07:40,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:40,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131348207] [2021-07-13 20:07:40,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131348207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:40,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337445671] [2021-07-13 20:07:40,943 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 [2021-07-13 20:07:40,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:07:40,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:40,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:07:40,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:41,336 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:07:41,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:07:41,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:41,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:41,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:41,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:07:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:41,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337445671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:41,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:41,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-07-13 20:07:41,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408490361] [2021-07-13 20:07:41,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:41,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:41,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:41,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:41,407 INFO L87 Difference]: Start difference. First operand 4423 states and 11254 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:46,537 INFO L93 Difference]: Finished difference Result 14347 states and 36035 transitions. [2021-07-13 20:07:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-13 20:07:46,538 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:07:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:46,561 INFO L225 Difference]: With dead ends: 14347 [2021-07-13 20:07:46,561 INFO L226 Difference]: Without dead ends: 13341 [2021-07-13 20:07:46,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7884 ImplicationChecksByTransitivity, 4172.6ms TimeCoverageRelationStatistics Valid=3139, Invalid=17741, Unknown=0, NotChecked=0, Total=20880 [2021-07-13 20:07:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-07-13 20:07:46,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 4643. [2021-07-13 20:07:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.5359758724687635) internal successors, (11772), 4642 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11772 transitions. [2021-07-13 20:07:46,699 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11772 transitions. Word has length 37 [2021-07-13 20:07:46,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:46,699 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11772 transitions. [2021-07-13 20:07:46,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11772 transitions. [2021-07-13 20:07:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:07:46,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:46,706 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:46,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:07:46,906 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:46,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2000668951, now seen corresponding path program 24 times [2021-07-13 20:07:46,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:46,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409086224] [2021-07-13 20:07:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:46,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:46,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409086224] [2021-07-13 20:07:46,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409086224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:46,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029092254] [2021-07-13 20:07:46,933 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 [2021-07-13 20:07:46,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:07:46,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:46,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:07:46,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:47,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029092254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:47,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:47,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 20:07:47,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895806279] [2021-07-13 20:07:47,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:07:47,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:47,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:07:47,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:07:47,030 INFO L87 Difference]: Start difference. First operand 4643 states and 11772 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:47,059 INFO L93 Difference]: Finished difference Result 5403 states and 13571 transitions. [2021-07-13 20:07:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:07:47,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:07:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:47,068 INFO L225 Difference]: With dead ends: 5403 [2021-07-13 20:07:47,069 INFO L226 Difference]: Without dead ends: 5331 [2021-07-13 20:07:47,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:07:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5331 states. [2021-07-13 20:07:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5331 to 4801. [2021-07-13 20:07:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 4800 states have (on average 2.536875) internal successors, (12177), 4800 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 12177 transitions. [2021-07-13 20:07:47,143 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 12177 transitions. Word has length 40 [2021-07-13 20:07:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:47,143 INFO L482 AbstractCegarLoop]: Abstraction has 4801 states and 12177 transitions. [2021-07-13 20:07:47,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 12177 transitions. [2021-07-13 20:07:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:07:47,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:47,151 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:47,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:47,356 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash 336026460, now seen corresponding path program 25 times [2021-07-13 20:07:47,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:47,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832935080] [2021-07-13 20:07:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:07:47,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:47,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832935080] [2021-07-13 20:07:47,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832935080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:47,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123799085] [2021-07-13 20:07:47,522 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 [2021-07-13 20:07:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:47,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:07:47,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:47,947 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:07:47,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:07:47,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:47,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:47,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:47,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:07:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:48,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123799085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:48,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:48,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 32 [2021-07-13 20:07:48,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230732665] [2021-07-13 20:07:48,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:07:48,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:07:48,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:07:48,017 INFO L87 Difference]: Start difference. First operand 4801 states and 12177 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:50,868 INFO L93 Difference]: Finished difference Result 10636 states and 26811 transitions. [2021-07-13 20:07:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:07:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:07:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:50,890 INFO L225 Difference]: With dead ends: 10636 [2021-07-13 20:07:50,890 INFO L226 Difference]: Without dead ends: 10514 [2021-07-13 20:07:50,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2356.7ms TimeCoverageRelationStatistics Valid=1395, Invalid=8111, Unknown=0, NotChecked=0, Total=9506 [2021-07-13 20:07:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-07-13 20:07:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 4901. [2021-07-13 20:07:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4901 states, 4900 states have (on average 2.5353061224489797) internal successors, (12423), 4900 states have internal predecessors, (12423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 12423 transitions. [2021-07-13 20:07:51,052 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 12423 transitions. Word has length 40 [2021-07-13 20:07:51,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:51,052 INFO L482 AbstractCegarLoop]: Abstraction has 4901 states and 12423 transitions. [2021-07-13 20:07:51,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 12423 transitions. [2021-07-13 20:07:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:07:51,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:51,061 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:51,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:07:51,262 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:51,262 INFO L82 PathProgramCache]: Analyzing trace with hash -427758525, now seen corresponding path program 26 times [2021-07-13 20:07:51,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:51,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624699951] [2021-07-13 20:07:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:51,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:51,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624699951] [2021-07-13 20:07:51,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624699951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:51,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755034942] [2021-07-13 20:07:51,562 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 [2021-07-13 20:07:51,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:51,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:51,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:52,181 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:07:52,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:07:52,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:52,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:52,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:52,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:07:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:52,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755034942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:52,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:52,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:07:52,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960752995] [2021-07-13 20:07:52,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:07:52,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:07:52,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:07:52,271 INFO L87 Difference]: Start difference. First operand 4901 states and 12423 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:59,177 INFO L93 Difference]: Finished difference Result 12060 states and 30372 transitions. [2021-07-13 20:07:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-07-13 20:07:59,178 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:07:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:59,193 INFO L225 Difference]: With dead ends: 12060 [2021-07-13 20:07:59,193 INFO L226 Difference]: Without dead ends: 10909 [2021-07-13 20:07:59,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 5344.9ms TimeCoverageRelationStatistics Valid=3516, Invalid=21924, Unknown=0, NotChecked=0, Total=25440 [2021-07-13 20:07:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-07-13 20:07:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 5132. [2021-07-13 20:07:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5132 states, 5131 states have (on average 2.540050672383551) internal successors, (13033), 5131 states have internal predecessors, (13033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 13033 transitions. [2021-07-13 20:07:59,288 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 13033 transitions. Word has length 43 [2021-07-13 20:07:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:59,288 INFO L482 AbstractCegarLoop]: Abstraction has 5132 states and 13033 transitions. [2021-07-13 20:07:59,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 13033 transitions. [2021-07-13 20:07:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:07:59,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:59,296 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:59,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:59,501 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash 110708185, now seen corresponding path program 27 times [2021-07-13 20:07:59,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:59,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740505473] [2021-07-13 20:07:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:59,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:59,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740505473] [2021-07-13 20:07:59,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740505473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:59,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895725746] [2021-07-13 20:07:59,816 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 [2021-07-13 20:07:59,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:07:59,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:59,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:07:59,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:00,480 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:08:00,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:08:00,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:00,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:00,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:00,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:08:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:00,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895725746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:00,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:08:00,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876925544] [2021-07-13 20:08:00,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:08:00,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:00,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:08:00,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:08:00,579 INFO L87 Difference]: Start difference. First operand 5132 states and 13033 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:10,486 INFO L93 Difference]: Finished difference Result 14776 states and 37218 transitions. [2021-07-13 20:08:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-07-13 20:08:10,487 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:08:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:10,507 INFO L225 Difference]: With dead ends: 14776 [2021-07-13 20:08:10,507 INFO L226 Difference]: Without dead ends: 13670 [2021-07-13 20:08:10,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15990 ImplicationChecksByTransitivity, 8508.7ms TimeCoverageRelationStatistics Valid=6081, Invalid=37391, Unknown=0, NotChecked=0, Total=43472 [2021-07-13 20:08:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13670 states. [2021-07-13 20:08:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13670 to 5194. [2021-07-13 20:08:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5193 states have (on average 2.5407279029462737) internal successors, (13194), 5193 states have internal predecessors, (13194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 13194 transitions. [2021-07-13 20:08:10,617 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 13194 transitions. Word has length 43 [2021-07-13 20:08:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:10,618 INFO L482 AbstractCegarLoop]: Abstraction has 5194 states and 13194 transitions. [2021-07-13 20:08:10,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 13194 transitions. [2021-07-13 20:08:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:08:10,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:10,624 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:10,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:08:10,825 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash -880659713, now seen corresponding path program 28 times [2021-07-13 20:08:10,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:10,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135231435] [2021-07-13 20:08:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:11,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135231435] [2021-07-13 20:08:11,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135231435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439955222] [2021-07-13 20:08:11,175 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 [2021-07-13 20:08:11,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:11,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:11,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:11,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:11,817 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:08:11,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:08:11,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:11,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:11,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:11,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:08:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:11,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439955222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:11,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:11,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:08:11,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575167359] [2021-07-13 20:08:11,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:08:11,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:11,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:08:11,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:08:11,903 INFO L87 Difference]: Start difference. First operand 5194 states and 13194 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:21,273 INFO L93 Difference]: Finished difference Result 14820 states and 37465 transitions. [2021-07-13 20:08:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-07-13 20:08:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:08:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:21,295 INFO L225 Difference]: With dead ends: 14820 [2021-07-13 20:08:21,296 INFO L226 Difference]: Without dead ends: 13932 [2021-07-13 20:08:21,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11848 ImplicationChecksByTransitivity, 7552.3ms TimeCoverageRelationStatistics Valid=4485, Invalid=30297, Unknown=0, NotChecked=0, Total=34782 [2021-07-13 20:08:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13932 states. [2021-07-13 20:08:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13932 to 5454. [2021-07-13 20:08:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5464881716486336) internal successors, (13886), 5453 states have internal predecessors, (13886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13886 transitions. [2021-07-13 20:08:21,406 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13886 transitions. Word has length 43 [2021-07-13 20:08:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:21,406 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13886 transitions. [2021-07-13 20:08:21,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13886 transitions. [2021-07-13 20:08:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:08:21,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:21,413 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:21,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:21,621 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash -764697707, now seen corresponding path program 29 times [2021-07-13 20:08:21,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:21,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771356153] [2021-07-13 20:08:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:21,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:21,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771356153] [2021-07-13 20:08:21,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771356153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:21,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722310765] [2021-07-13 20:08:21,939 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 [2021-07-13 20:08:21,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:08:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:23,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:23,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:23,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:23,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:08:23,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:23,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:23,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:23,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:10 [2021-07-13 20:08:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:23,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722310765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:23,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:23,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:08:23,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931276975] [2021-07-13 20:08:23,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:08:23,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:23,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:08:23,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:08:23,196 INFO L87 Difference]: Start difference. First operand 5454 states and 13886 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,837 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-07-13 20:08:37,339 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-07-13 20:08:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:54,327 INFO L93 Difference]: Finished difference Result 15621 states and 39738 transitions. [2021-07-13 20:08:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-07-13 20:08:54,327 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:08:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:54,348 INFO L225 Difference]: With dead ends: 15621 [2021-07-13 20:08:54,348 INFO L226 Difference]: Without dead ends: 14882 [2021-07-13 20:08:54,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12068 ImplicationChecksByTransitivity, 13364.5ms TimeCoverageRelationStatistics Valid=4072, Invalid=29967, Unknown=1, NotChecked=0, Total=34040 [2021-07-13 20:08:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14882 states. [2021-07-13 20:08:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14882 to 6016. [2021-07-13 20:08:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.5620947630922695) internal successors, (15411), 6015 states have internal predecessors, (15411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 15411 transitions. [2021-07-13 20:08:54,466 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 15411 transitions. Word has length 43 [2021-07-13 20:08:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:54,466 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 15411 transitions. [2021-07-13 20:08:54,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 15411 transitions. [2021-07-13 20:08:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:08:54,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:54,473 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:54,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:54,674 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1773642173, now seen corresponding path program 30 times [2021-07-13 20:08:54,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:54,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151341831] [2021-07-13 20:08:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:54,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:54,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151341831] [2021-07-13 20:08:54,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151341831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:54,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388207664] [2021-07-13 20:08:54,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:55,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:08:55,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:55,576 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:08:55,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:08:55,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:55,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:55,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:55,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:08:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:55,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388207664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:55,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:55,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:08:55,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698949019] [2021-07-13 20:08:55,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:08:55,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:55,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:08:55,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:08:55,650 INFO L87 Difference]: Start difference. First operand 6016 states and 15411 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:06,972 INFO L93 Difference]: Finished difference Result 20637 states and 52374 transitions. [2021-07-13 20:09:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-07-13 20:09:06,972 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:09:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:07,002 INFO L225 Difference]: With dead ends: 20637 [2021-07-13 20:09:07,002 INFO L226 Difference]: Without dead ends: 18278 [2021-07-13 20:09:07,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24578 ImplicationChecksByTransitivity, 9539.2ms TimeCoverageRelationStatistics Valid=8601, Invalid=52161, Unknown=0, NotChecked=0, Total=60762 [2021-07-13 20:09:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18278 states. [2021-07-13 20:09:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18278 to 6142. [2021-07-13 20:09:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 2.563100472235792) internal successors, (15740), 6141 states have internal predecessors, (15740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 15740 transitions. [2021-07-13 20:09:07,157 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 15740 transitions. Word has length 43 [2021-07-13 20:09:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:07,157 INFO L482 AbstractCegarLoop]: Abstraction has 6142 states and 15740 transitions. [2021-07-13 20:09:07,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 15740 transitions. [2021-07-13 20:09:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:09:07,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:07,166 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:07,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:07,381 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash 875403101, now seen corresponding path program 31 times [2021-07-13 20:09:07,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:07,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644055623] [2021-07-13 20:09:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:07,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:07,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644055623] [2021-07-13 20:09:07,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644055623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:07,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645618921] [2021-07-13 20:09:07,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:08,246 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:09:08,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:09:08,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:08,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:08,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:08,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:09:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:08,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645618921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:08,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:08,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:09:08,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747197725] [2021-07-13 20:09:08,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:09:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:08,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:09:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:09:08,329 INFO L87 Difference]: Start difference. First operand 6142 states and 15740 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:18,653 INFO L93 Difference]: Finished difference Result 17902 states and 45508 transitions. [2021-07-13 20:09:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-07-13 20:09:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:09:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:18,676 INFO L225 Difference]: With dead ends: 17902 [2021-07-13 20:09:18,677 INFO L226 Difference]: Without dead ends: 16706 [2021-07-13 20:09:18,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20501 ImplicationChecksByTransitivity, 8495.5ms TimeCoverageRelationStatistics Valid=7171, Invalid=45499, Unknown=0, NotChecked=0, Total=52670 [2021-07-13 20:09:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16706 states. [2021-07-13 20:09:18,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16706 to 6404. [2021-07-13 20:09:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6404 states, 6403 states have (on average 2.567702639387787) internal successors, (16441), 6403 states have internal predecessors, (16441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6404 states to 6404 states and 16441 transitions. [2021-07-13 20:09:18,817 INFO L78 Accepts]: Start accepts. Automaton has 6404 states and 16441 transitions. Word has length 43 [2021-07-13 20:09:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:18,817 INFO L482 AbstractCegarLoop]: Abstraction has 6404 states and 16441 transitions. [2021-07-13 20:09:18,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6404 states and 16441 transitions. [2021-07-13 20:09:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:09:18,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:18,827 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:19,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:09:19,027 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:19,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1672349977, now seen corresponding path program 32 times [2021-07-13 20:09:19,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:19,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298635555] [2021-07-13 20:09:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:19,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:19,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298635555] [2021-07-13 20:09:19,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298635555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:19,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347132751] [2021-07-13 20:09:19,282 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 [2021-07-13 20:09:19,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:19,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:19,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:20,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-07-13 20:09:20,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:20,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:20,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:20,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-07-13 20:09:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:20,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347132751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:20,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:20,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:09:20,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377207330] [2021-07-13 20:09:20,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:20,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:20,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:20,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:20,140 INFO L87 Difference]: Start difference. First operand 6404 states and 16441 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:30,032 INFO L93 Difference]: Finished difference Result 20466 states and 52270 transitions. [2021-07-13 20:09:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-07-13 20:09:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:09:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:30,067 INFO L225 Difference]: With dead ends: 20466 [2021-07-13 20:09:30,068 INFO L226 Difference]: Without dead ends: 18559 [2021-07-13 20:09:30,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17805 ImplicationChecksByTransitivity, 7871.0ms TimeCoverageRelationStatistics Valid=6025, Invalid=39131, Unknown=0, NotChecked=0, Total=45156 [2021-07-13 20:09:30,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18559 states. [2021-07-13 20:09:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18559 to 7142. [2021-07-13 20:09:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 2.563786584511973) internal successors, (18308), 7141 states have internal predecessors, (18308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 18308 transitions. [2021-07-13 20:09:30,272 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 18308 transitions. Word has length 43 [2021-07-13 20:09:30,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:30,273 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 18308 transitions. [2021-07-13 20:09:30,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 18308 transitions. [2021-07-13 20:09:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:09:30,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:30,283 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:30,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:30,484 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:30,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1747211427, now seen corresponding path program 33 times [2021-07-13 20:09:30,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:30,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958583004] [2021-07-13 20:09:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:30,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:30,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958583004] [2021-07-13 20:09:30,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958583004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:30,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136964736] [2021-07-13 20:09:30,834 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 [2021-07-13 20:09:30,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:09:30,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:30,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:30,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:31,612 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:09:31,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:09:31,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:31,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:31,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:31,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:09:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:31,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136964736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:31,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:31,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:09:31,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666244581] [2021-07-13 20:09:31,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:31,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:31,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:31,694 INFO L87 Difference]: Start difference. First operand 7142 states and 18308 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:39,604 INFO L93 Difference]: Finished difference Result 17841 states and 45530 transitions. [2021-07-13 20:09:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-07-13 20:09:39,604 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:09:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:39,649 INFO L225 Difference]: With dead ends: 17841 [2021-07-13 20:09:39,650 INFO L226 Difference]: Without dead ends: 17342 [2021-07-13 20:09:39,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13007 ImplicationChecksByTransitivity, 6533.7ms TimeCoverageRelationStatistics Valid=4015, Invalid=30767, Unknown=0, NotChecked=0, Total=34782 [2021-07-13 20:09:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17342 states. [2021-07-13 20:09:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17342 to 8284. [2021-07-13 20:09:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 2.5694796571290595) internal successors, (21283), 8283 states have internal predecessors, (21283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 21283 transitions. [2021-07-13 20:09:39,878 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 21283 transitions. Word has length 43 [2021-07-13 20:09:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:39,878 INFO L482 AbstractCegarLoop]: Abstraction has 8284 states and 21283 transitions. [2021-07-13 20:09:39,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 21283 transitions. [2021-07-13 20:09:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:09:39,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:39,889 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:40,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:40,105 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:40,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1084673731, now seen corresponding path program 34 times [2021-07-13 20:09:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:40,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793459999] [2021-07-13 20:09:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:40,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:40,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793459999] [2021-07-13 20:09:40,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793459999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:40,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362138400] [2021-07-13 20:09:40,369 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 [2021-07-13 20:09:40,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:40,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:40,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:40,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:40,965 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:09:40,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:09:40,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:40,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:40,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:40,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:09:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:41,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362138400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:41,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:41,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:09:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986980020] [2021-07-13 20:09:41,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:09:41,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:09:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:41,043 INFO L87 Difference]: Start difference. First operand 8284 states and 21283 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:51,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:51,710 INFO L93 Difference]: Finished difference Result 20442 states and 52162 transitions. [2021-07-13 20:09:51,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-07-13 20:09:51,710 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:09:51,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:51,739 INFO L225 Difference]: With dead ends: 20442 [2021-07-13 20:09:51,739 INFO L226 Difference]: Without dead ends: 19406 [2021-07-13 20:09:51,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18575 ImplicationChecksByTransitivity, 8272.1ms TimeCoverageRelationStatistics Valid=6094, Invalid=41212, Unknown=0, NotChecked=0, Total=47306 [2021-07-13 20:09:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19406 states. [2021-07-13 20:09:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19406 to 8918. [2021-07-13 20:09:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8918 states, 8917 states have (on average 2.5737355612874286) internal successors, (22950), 8917 states have internal predecessors, (22950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8918 states to 8918 states and 22950 transitions. [2021-07-13 20:09:51,935 INFO L78 Accepts]: Start accepts. Automaton has 8918 states and 22950 transitions. Word has length 43 [2021-07-13 20:09:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:51,935 INFO L482 AbstractCegarLoop]: Abstraction has 8918 states and 22950 transitions. [2021-07-13 20:09:51,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 8918 states and 22950 transitions. [2021-07-13 20:09:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:09:51,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:51,947 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:52,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 20:09:52,163 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:52,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1869332675, now seen corresponding path program 35 times [2021-07-13 20:09:52,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:52,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330164100] [2021-07-13 20:09:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:52,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:52,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330164100] [2021-07-13 20:09:52,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330164100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:52,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059169727] [2021-07-13 20:09:52,463 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 [2021-07-13 20:09:52,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:09:52,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:52,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:09:53,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:53,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:10 [2021-07-13 20:09:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:53,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059169727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:53,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:09:53,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692128522] [2021-07-13 20:09:53,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:09:53,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:09:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:53,220 INFO L87 Difference]: Start difference. First operand 8918 states and 22950 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:02,699 INFO L93 Difference]: Finished difference Result 23587 states and 60165 transitions. [2021-07-13 20:10:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-07-13 20:10:02,699 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:02,736 INFO L225 Difference]: With dead ends: 23587 [2021-07-13 20:10:02,736 INFO L226 Difference]: Without dead ends: 21831 [2021-07-13 20:10:02,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19157 ImplicationChecksByTransitivity, 7260.0ms TimeCoverageRelationStatistics Valid=5543, Invalid=41763, Unknown=0, NotChecked=0, Total=47306 [2021-07-13 20:10:02,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21831 states. [2021-07-13 20:10:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21831 to 10760. [2021-07-13 20:10:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10759 states have (on average 2.589924714192769) internal successors, (27865), 10759 states have internal predecessors, (27865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 27865 transitions. [2021-07-13 20:10:02,985 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 27865 transitions. Word has length 43 [2021-07-13 20:10:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:02,985 INFO L482 AbstractCegarLoop]: Abstraction has 10760 states and 27865 transitions. [2021-07-13 20:10:02,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 27865 transitions. [2021-07-13 20:10:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:02,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:02,998 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:03,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:03,199 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1988274585, now seen corresponding path program 36 times [2021-07-13 20:10:03,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:03,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725121039] [2021-07-13 20:10:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:03,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:03,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725121039] [2021-07-13 20:10:03,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725121039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:03,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625066782] [2021-07-13 20:10:03,485 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 [2021-07-13 20:10:03,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:10:03,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:03,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:03,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:04,077 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:10:04,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:10:04,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:04,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:10:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:04,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625066782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:04,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:04,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-07-13 20:10:04,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493059504] [2021-07-13 20:10:04,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:10:04,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:04,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:10:04,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:10:04,148 INFO L87 Difference]: Start difference. First operand 10760 states and 27865 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:11,454 INFO L93 Difference]: Finished difference Result 22434 states and 57580 transitions. [2021-07-13 20:10:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-07-13 20:10:11,454 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:11,490 INFO L225 Difference]: With dead ends: 22434 [2021-07-13 20:10:11,490 INFO L226 Difference]: Without dead ends: 21334 [2021-07-13 20:10:11,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13996 ImplicationChecksByTransitivity, 5940.7ms TimeCoverageRelationStatistics Valid=3941, Invalid=31591, Unknown=0, NotChecked=0, Total=35532 [2021-07-13 20:10:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21334 states. [2021-07-13 20:10:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21334 to 12742. [2021-07-13 20:10:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12742 states, 12741 states have (on average 2.596028569186092) internal successors, (33076), 12741 states have internal predecessors, (33076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12742 states to 12742 states and 33076 transitions. [2021-07-13 20:10:11,809 INFO L78 Accepts]: Start accepts. Automaton has 12742 states and 33076 transitions. Word has length 43 [2021-07-13 20:10:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:11,809 INFO L482 AbstractCegarLoop]: Abstraction has 12742 states and 33076 transitions. [2021-07-13 20:10:11,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 12742 states and 33076 transitions. [2021-07-13 20:10:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:11,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:11,828 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:12,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 20:10:12,046 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:12,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1217725385, now seen corresponding path program 37 times [2021-07-13 20:10:12,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:12,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599436335] [2021-07-13 20:10:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:12,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:12,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599436335] [2021-07-13 20:10:12,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599436335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:12,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796501418] [2021-07-13 20:10:12,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:12,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:12,940 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:10:12,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:10:12,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:12,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:10:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:13,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796501418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:13,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:13,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:10:13,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666610371] [2021-07-13 20:10:13,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:10:13,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:10:13,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:10:13,034 INFO L87 Difference]: Start difference. First operand 12742 states and 33076 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:22,191 INFO L93 Difference]: Finished difference Result 32165 states and 83382 transitions. [2021-07-13 20:10:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-07-13 20:10:22,191 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:22,321 INFO L225 Difference]: With dead ends: 32165 [2021-07-13 20:10:22,321 INFO L226 Difference]: Without dead ends: 31312 [2021-07-13 20:10:22,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13281 ImplicationChecksByTransitivity, 6918.3ms TimeCoverageRelationStatistics Valid=4644, Invalid=31266, Unknown=0, NotChecked=0, Total=35910 [2021-07-13 20:10:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31312 states. [2021-07-13 20:10:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31312 to 13654. [2021-07-13 20:10:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13654 states, 13653 states have (on average 2.5966454259137186) internal successors, (35452), 13653 states have internal predecessors, (35452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13654 states to 13654 states and 35452 transitions. [2021-07-13 20:10:22,746 INFO L78 Accepts]: Start accepts. Automaton has 13654 states and 35452 transitions. Word has length 43 [2021-07-13 20:10:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:22,746 INFO L482 AbstractCegarLoop]: Abstraction has 13654 states and 35452 transitions. [2021-07-13 20:10:22,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 13654 states and 35452 transitions. [2021-07-13 20:10:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:22,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:22,772 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:22,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 20:10:22,973 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:22,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1101763379, now seen corresponding path program 38 times [2021-07-13 20:10:22,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:22,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438738275] [2021-07-13 20:10:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:23,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:23,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438738275] [2021-07-13 20:10:23,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438738275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:23,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616981011] [2021-07-13 20:10:23,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:23,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:23,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:23,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:23,890 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:10:23,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:10:23,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:23,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:23,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:23,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:10:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:23,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616981011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:23,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:23,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:10:23,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446210559] [2021-07-13 20:10:23,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:10:23,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:23,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:10:23,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:10:23,969 INFO L87 Difference]: Start difference. First operand 13654 states and 35452 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:31,417 INFO L93 Difference]: Finished difference Result 31006 states and 80485 transitions. [2021-07-13 20:10:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-07-13 20:10:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:31,500 INFO L225 Difference]: With dead ends: 31006 [2021-07-13 20:10:31,500 INFO L226 Difference]: Without dead ends: 30540 [2021-07-13 20:10:31,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11497 ImplicationChecksByTransitivity, 5800.5ms TimeCoverageRelationStatistics Valid=3867, Invalid=26583, Unknown=0, NotChecked=0, Total=30450 [2021-07-13 20:10:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30540 states. [2021-07-13 20:10:31,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30540 to 13812. [2021-07-13 20:10:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13812 states, 13811 states have (on average 2.600825429005865) internal successors, (35920), 13811 states have internal predecessors, (35920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13812 states to 13812 states and 35920 transitions. [2021-07-13 20:10:31,994 INFO L78 Accepts]: Start accepts. Automaton has 13812 states and 35920 transitions. Word has length 43 [2021-07-13 20:10:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:31,995 INFO L482 AbstractCegarLoop]: Abstraction has 13812 states and 35920 transitions. [2021-07-13 20:10:31,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 13812 states and 35920 transitions. [2021-07-13 20:10:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:32,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:32,019 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:32,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:32,219 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash -979642131, now seen corresponding path program 39 times [2021-07-13 20:10:32,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:32,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056001420] [2021-07-13 20:10:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:32,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:32,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056001420] [2021-07-13 20:10:32,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056001420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:32,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968740218] [2021-07-13 20:10:32,500 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 [2021-07-13 20:10:32,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:10:32,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:32,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:33,147 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:10:33,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:10:33,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:33,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:33,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:33,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:10:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:33,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968740218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:33,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:33,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:10:33,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491344562] [2021-07-13 20:10:33,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:10:33,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:33,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:10:33,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:10:33,224 INFO L87 Difference]: Start difference. First operand 13812 states and 35920 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:37,931 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-07-13 20:10:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:42,207 INFO L93 Difference]: Finished difference Result 36511 states and 95055 transitions. [2021-07-13 20:10:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-07-13 20:10:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:42,294 INFO L225 Difference]: With dead ends: 36511 [2021-07-13 20:10:42,294 INFO L226 Difference]: Without dead ends: 34823 [2021-07-13 20:10:42,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15877 ImplicationChecksByTransitivity, 6927.0ms TimeCoverageRelationStatistics Valid=5024, Invalid=34776, Unknown=0, NotChecked=0, Total=39800 [2021-07-13 20:10:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34823 states. [2021-07-13 20:10:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34823 to 15038. [2021-07-13 20:10:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15038 states, 15037 states have (on average 2.606969475294274) internal successors, (39201), 15037 states have internal predecessors, (39201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15038 states to 15038 states and 39201 transitions. [2021-07-13 20:10:42,731 INFO L78 Accepts]: Start accepts. Automaton has 15038 states and 39201 transitions. Word has length 43 [2021-07-13 20:10:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:42,731 INFO L482 AbstractCegarLoop]: Abstraction has 15038 states and 39201 transitions. [2021-07-13 20:10:42,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:42,731 INFO L276 IsEmpty]: Start isEmpty. Operand 15038 states and 39201 transitions. [2021-07-13 20:10:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:42,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:42,751 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:42,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 20:10:42,952 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:42,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:42,952 INFO L82 PathProgramCache]: Analyzing trace with hash -542282095, now seen corresponding path program 40 times [2021-07-13 20:10:42,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:42,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463117613] [2021-07-13 20:10:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:43,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:43,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463117613] [2021-07-13 20:10:43,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463117613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:43,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488548859] [2021-07-13 20:10:43,185 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 [2021-07-13 20:10:43,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:43,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:43,818 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:10:43,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:10:43,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:43,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:43,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:43,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:10:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:43,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488548859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:43,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:43,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-07-13 20:10:43,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689750618] [2021-07-13 20:10:43,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:10:43,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:43,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:10:43,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:10:43,887 INFO L87 Difference]: Start difference. First operand 15038 states and 39201 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:50,773 INFO L93 Difference]: Finished difference Result 33624 states and 87489 transitions. [2021-07-13 20:10:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-07-13 20:10:50,773 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:50,841 INFO L225 Difference]: With dead ends: 33624 [2021-07-13 20:10:50,841 INFO L226 Difference]: Without dead ends: 32372 [2021-07-13 20:10:50,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11409 ImplicationChecksByTransitivity, 5199.3ms TimeCoverageRelationStatistics Valid=3608, Invalid=25804, Unknown=0, NotChecked=0, Total=29412 [2021-07-13 20:10:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32372 states. [2021-07-13 20:10:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32372 to 14940. [2021-07-13 20:10:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14940 states, 14939 states have (on average 2.6187830510743693) internal successors, (39122), 14939 states have internal predecessors, (39122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14940 states to 14940 states and 39122 transitions. [2021-07-13 20:10:51,236 INFO L78 Accepts]: Start accepts. Automaton has 14940 states and 39122 transitions. Word has length 43 [2021-07-13 20:10:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:51,236 INFO L482 AbstractCegarLoop]: Abstraction has 14940 states and 39122 transitions. [2021-07-13 20:10:51,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 14940 states and 39122 transitions. [2021-07-13 20:10:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:51,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:51,259 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:51,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:10:51,460 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:51,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1709625473, now seen corresponding path program 41 times [2021-07-13 20:10:51,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:51,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097883478] [2021-07-13 20:10:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:51,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:51,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097883478] [2021-07-13 20:10:51,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097883478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:51,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896127233] [2021-07-13 20:10:51,788 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 [2021-07-13 20:10:51,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:10:51,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:51,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:51,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:52,371 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:10:52,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:10:52,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:52,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:52,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:52,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:10:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:52,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896127233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:52,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:52,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:10:52,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308128029] [2021-07-13 20:10:52,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:10:52,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:52,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:10:52,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:10:52,446 INFO L87 Difference]: Start difference. First operand 14940 states and 39122 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:01,096 INFO L93 Difference]: Finished difference Result 36476 states and 95769 transitions. [2021-07-13 20:11:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-07-13 20:11:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:01,184 INFO L225 Difference]: With dead ends: 36476 [2021-07-13 20:11:01,184 INFO L226 Difference]: Without dead ends: 34935 [2021-07-13 20:11:01,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14698 ImplicationChecksByTransitivity, 6771.2ms TimeCoverageRelationStatistics Valid=4399, Invalid=33043, Unknown=0, NotChecked=0, Total=37442 [2021-07-13 20:11:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34935 states. [2021-07-13 20:11:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34935 to 16690. [2021-07-13 20:11:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16690 states, 16689 states have (on average 2.6272994187788363) internal successors, (43847), 16689 states have internal predecessors, (43847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16690 states to 16690 states and 43847 transitions. [2021-07-13 20:11:01,729 INFO L78 Accepts]: Start accepts. Automaton has 16690 states and 43847 transitions. Word has length 43 [2021-07-13 20:11:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:01,729 INFO L482 AbstractCegarLoop]: Abstraction has 16690 states and 43847 transitions. [2021-07-13 20:11:01,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 16690 states and 43847 transitions. [2021-07-13 20:11:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:01,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:01,760 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:01,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:11:01,961 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash -509263027, now seen corresponding path program 42 times [2021-07-13 20:11:01,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:01,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387393355] [2021-07-13 20:11:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:11:02,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:02,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387393355] [2021-07-13 20:11:02,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387393355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:02,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074238582] [2021-07-13 20:11:02,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:02,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:11:02,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:02,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:02,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:02,872 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:11:02,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:11:02,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:02,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:02,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:02,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:11:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:02,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074238582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:02,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:02,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-07-13 20:11:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385006144] [2021-07-13 20:11:02,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:11:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:11:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:11:02,947 INFO L87 Difference]: Start difference. First operand 16690 states and 43847 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:09,521 INFO L93 Difference]: Finished difference Result 30990 states and 80539 transitions. [2021-07-13 20:11:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-07-13 20:11:09,521 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:09,580 INFO L225 Difference]: With dead ends: 30990 [2021-07-13 20:11:09,580 INFO L226 Difference]: Without dead ends: 29948 [2021-07-13 20:11:09,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10628 ImplicationChecksByTransitivity, 5164.5ms TimeCoverageRelationStatistics Valid=3180, Invalid=24542, Unknown=0, NotChecked=0, Total=27722 [2021-07-13 20:11:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29948 states. [2021-07-13 20:11:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29948 to 17300. [2021-07-13 20:11:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17300 states, 17299 states have (on average 2.6337360541071737) internal successors, (45561), 17299 states have internal predecessors, (45561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17300 states to 17300 states and 45561 transitions. [2021-07-13 20:11:09,947 INFO L78 Accepts]: Start accepts. Automaton has 17300 states and 45561 transitions. Word has length 43 [2021-07-13 20:11:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:09,948 INFO L482 AbstractCegarLoop]: Abstraction has 17300 states and 45561 transitions. [2021-07-13 20:11:09,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 17300 states and 45561 transitions. [2021-07-13 20:11:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:09,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:09,970 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:10,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:10,177 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:10,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:10,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2104375741, now seen corresponding path program 43 times [2021-07-13 20:11:10,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:10,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702227316] [2021-07-13 20:11:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:10,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:10,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702227316] [2021-07-13 20:11:10,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702227316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:10,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128423335] [2021-07-13 20:11:10,446 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 [2021-07-13 20:11:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:11,079 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:11:11,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:11:11,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:11,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:11,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:11,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:11:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:11,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128423335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:11,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:11,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:11:11,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997973124] [2021-07-13 20:11:11,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:11:11,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:11,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:11:11,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:11:11,158 INFO L87 Difference]: Start difference. First operand 17300 states and 45561 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:16,730 INFO L93 Difference]: Finished difference Result 37293 states and 97067 transitions. [2021-07-13 20:11:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-13 20:11:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:16,809 INFO L225 Difference]: With dead ends: 37293 [2021-07-13 20:11:16,810 INFO L226 Difference]: Without dead ends: 36869 [2021-07-13 20:11:16,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8047 ImplicationChecksByTransitivity, 4610.2ms TimeCoverageRelationStatistics Valid=3368, Invalid=20194, Unknown=0, NotChecked=0, Total=23562 [2021-07-13 20:11:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36869 states. [2021-07-13 20:11:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36869 to 18932. [2021-07-13 20:11:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18932 states, 18931 states have (on average 2.627700596904548) internal successors, (49745), 18931 states have internal predecessors, (49745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18932 states to 18932 states and 49745 transitions. [2021-07-13 20:11:17,401 INFO L78 Accepts]: Start accepts. Automaton has 18932 states and 49745 transitions. Word has length 43 [2021-07-13 20:11:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:17,401 INFO L482 AbstractCegarLoop]: Abstraction has 18932 states and 49745 transitions. [2021-07-13 20:11:17,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand 18932 states and 49745 transitions. [2021-07-13 20:11:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:17,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:17,436 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:17,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 20:11:17,637 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash 544669533, now seen corresponding path program 44 times [2021-07-13 20:11:17,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:17,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442533415] [2021-07-13 20:11:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:18,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:18,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442533415] [2021-07-13 20:11:18,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442533415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:18,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748242712] [2021-07-13 20:11:18,037 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 [2021-07-13 20:11:18,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:18,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:18,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-07-13 20:11:18,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:18,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:18,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:18,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-07-13 20:11:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:18,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748242712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:18,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:18,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:11:18,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419229215] [2021-07-13 20:11:18,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:11:18,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:18,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:11:18,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:11:18,931 INFO L87 Difference]: Start difference. First operand 18932 states and 49745 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:26,651 INFO L93 Difference]: Finished difference Result 39448 states and 103216 transitions. [2021-07-13 20:11:26,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-07-13 20:11:26,651 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:26,719 INFO L225 Difference]: With dead ends: 39448 [2021-07-13 20:11:26,719 INFO L226 Difference]: Without dead ends: 38630 [2021-07-13 20:11:26,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10922 ImplicationChecksByTransitivity, 6544.2ms TimeCoverageRelationStatistics Valid=4697, Invalid=25753, Unknown=0, NotChecked=0, Total=30450 [2021-07-13 20:11:26,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38630 states. [2021-07-13 20:11:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38630 to 19230. [2021-07-13 20:11:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19230 states, 19229 states have (on average 2.623953403713142) internal successors, (50456), 19229 states have internal predecessors, (50456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19230 states to 19230 states and 50456 transitions. [2021-07-13 20:11:27,157 INFO L78 Accepts]: Start accepts. Automaton has 19230 states and 50456 transitions. Word has length 43 [2021-07-13 20:11:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:27,157 INFO L482 AbstractCegarLoop]: Abstraction has 19230 states and 50456 transitions. [2021-07-13 20:11:27,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 19230 states and 50456 transitions. [2021-07-13 20:11:27,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:27,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:27,184 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:27,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 20:11:27,386 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash -268346073, now seen corresponding path program 45 times [2021-07-13 20:11:27,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:27,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958138108] [2021-07-13 20:11:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:11:27,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:27,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958138108] [2021-07-13 20:11:27,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958138108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:27,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494587151] [2021-07-13 20:11:27,640 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 [2021-07-13 20:11:27,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:11:27,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:28,259 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:11:28,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:11:28,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:28,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:28,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:28,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:11:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:28,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494587151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:28,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:28,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-07-13 20:11:28,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326036007] [2021-07-13 20:11:28,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:11:28,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:11:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:11:28,328 INFO L87 Difference]: Start difference. First operand 19230 states and 50456 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:35,086 INFO L93 Difference]: Finished difference Result 39931 states and 104656 transitions. [2021-07-13 20:11:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-07-13 20:11:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:35,192 INFO L225 Difference]: With dead ends: 39931 [2021-07-13 20:11:35,192 INFO L226 Difference]: Without dead ends: 38867 [2021-07-13 20:11:35,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11020 ImplicationChecksByTransitivity, 5345.4ms TimeCoverageRelationStatistics Valid=3483, Invalid=24573, Unknown=0, NotChecked=0, Total=28056 [2021-07-13 20:11:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38867 states. [2021-07-13 20:11:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38867 to 21046. [2021-07-13 20:11:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21046 states, 21045 states have (on average 2.633071988595866) internal successors, (55413), 21045 states have internal predecessors, (55413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21046 states to 21046 states and 55413 transitions. [2021-07-13 20:11:35,837 INFO L78 Accepts]: Start accepts. Automaton has 21046 states and 55413 transitions. Word has length 43 [2021-07-13 20:11:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:35,837 INFO L482 AbstractCegarLoop]: Abstraction has 21046 states and 55413 transitions. [2021-07-13 20:11:35,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 21046 states and 55413 transitions. [2021-07-13 20:11:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:35,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:35,873 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:36,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:11:36,074 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash 494656337, now seen corresponding path program 46 times [2021-07-13 20:11:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:36,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132141331] [2021-07-13 20:11:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:11:36,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:36,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132141331] [2021-07-13 20:11:36,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132141331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:36,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065252394] [2021-07-13 20:11:36,313 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 [2021-07-13 20:11:36,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:36,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:36,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:36,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:36,949 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:11:36,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:11:36,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:36,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:36,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:36,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:11:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:37,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065252394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:37,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:37,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-07-13 20:11:37,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490306504] [2021-07-13 20:11:37,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:11:37,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:11:37,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:11:37,030 INFO L87 Difference]: Start difference. First operand 21046 states and 55413 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:43,572 INFO L93 Difference]: Finished difference Result 40519 states and 105709 transitions. [2021-07-13 20:11:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-07-13 20:11:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:43,642 INFO L225 Difference]: With dead ends: 40519 [2021-07-13 20:11:43,643 INFO L226 Difference]: Without dead ends: 39385 [2021-07-13 20:11:43,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11957 ImplicationChecksByTransitivity, 5258.2ms TimeCoverageRelationStatistics Valid=3626, Invalid=26476, Unknown=0, NotChecked=0, Total=30102 [2021-07-13 20:11:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39385 states. [2021-07-13 20:11:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39385 to 21992. [2021-07-13 20:11:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21992 states, 21991 states have (on average 2.637442590150516) internal successors, (58000), 21991 states have internal predecessors, (58000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21992 states to 21992 states and 58000 transitions. [2021-07-13 20:11:44,169 INFO L78 Accepts]: Start accepts. Automaton has 21992 states and 58000 transitions. Word has length 43 [2021-07-13 20:11:44,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:44,169 INFO L482 AbstractCegarLoop]: Abstraction has 21992 states and 58000 transitions. [2021-07-13 20:11:44,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 21992 states and 58000 transitions. [2021-07-13 20:11:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:44,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:44,198 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:44,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-07-13 20:11:44,399 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:44,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1349265309, now seen corresponding path program 47 times [2021-07-13 20:11:44,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:44,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521542968] [2021-07-13 20:11:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:44,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:44,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521542968] [2021-07-13 20:11:44,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521542968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:44,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871868744] [2021-07-13 20:11:44,638 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 [2021-07-13 20:11:44,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:11:44,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:11:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:45,225 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:11:45,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:11:45,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:45,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:45,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:45,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:11:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:45,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871868744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:45,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:45,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:11:45,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039277901] [2021-07-13 20:11:45,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:11:45,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:45,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:11:45,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:11:45,301 INFO L87 Difference]: Start difference. First operand 21992 states and 58000 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:45,990 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-07-13 20:11:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:54,624 INFO L93 Difference]: Finished difference Result 53558 states and 141893 transitions. [2021-07-13 20:11:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-07-13 20:11:54,624 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:54,792 INFO L225 Difference]: With dead ends: 53558 [2021-07-13 20:11:54,793 INFO L226 Difference]: Without dead ends: 52355 [2021-07-13 20:11:54,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14187 ImplicationChecksByTransitivity, 7383.5ms TimeCoverageRelationStatistics Valid=5074, Invalid=31598, Unknown=0, NotChecked=0, Total=36672 [2021-07-13 20:11:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52355 states. [2021-07-13 20:11:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52355 to 22438. [2021-07-13 20:11:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22438 states, 22437 states have (on average 2.634398538128983) internal successors, (59108), 22437 states have internal predecessors, (59108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22438 states to 22438 states and 59108 transitions. [2021-07-13 20:11:55,524 INFO L78 Accepts]: Start accepts. Automaton has 22438 states and 59108 transitions. Word has length 43 [2021-07-13 20:11:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:55,524 INFO L482 AbstractCegarLoop]: Abstraction has 22438 states and 59108 transitions. [2021-07-13 20:11:55,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 22438 states and 59108 transitions. [2021-07-13 20:11:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:55,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:55,568 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:55,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:55,788 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:55,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1954334089, now seen corresponding path program 48 times [2021-07-13 20:11:55,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:55,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358491144] [2021-07-13 20:11:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:56,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:56,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358491144] [2021-07-13 20:11:56,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358491144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:56,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58591977] [2021-07-13 20:11:56,041 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 [2021-07-13 20:11:56,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:11:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:56,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:56,455 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-13 20:11:56,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:56,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-07-13 20:11:56,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:56,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-07-13 20:11:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:57,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58591977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:57,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:57,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:11:57,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163969782] [2021-07-13 20:11:57,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:11:57,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:57,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:11:57,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:11:57,064 INFO L87 Difference]: Start difference. First operand 22438 states and 59108 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:04,386 INFO L93 Difference]: Finished difference Result 42320 states and 111228 transitions. [2021-07-13 20:12:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-07-13 20:12:04,386 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:04,487 INFO L225 Difference]: With dead ends: 42320 [2021-07-13 20:12:04,487 INFO L226 Difference]: Without dead ends: 41609 [2021-07-13 20:12:04,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9951 ImplicationChecksByTransitivity, 5491.9ms TimeCoverageRelationStatistics Valid=3725, Invalid=23335, Unknown=0, NotChecked=0, Total=27060 [2021-07-13 20:12:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41609 states. [2021-07-13 20:12:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41609 to 23462. [2021-07-13 20:12:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 2.626699629171817) internal successors, (61625), 23461 states have internal predecessors, (61625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 61625 transitions. [2021-07-13 20:12:05,121 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 61625 transitions. Word has length 43 [2021-07-13 20:12:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:05,121 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 61625 transitions. [2021-07-13 20:12:05,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 61625 transitions. [2021-07-13 20:12:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:05,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:05,157 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:05,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 20:12:05,357 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:05,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1632170849, now seen corresponding path program 49 times [2021-07-13 20:12:05,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:05,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786673553] [2021-07-13 20:12:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:12:05,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:05,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786673553] [2021-07-13 20:12:05,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786673553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:05,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93143327] [2021-07-13 20:12:05,599 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 [2021-07-13 20:12:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:05,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:05,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:06,171 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:12:06,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:12:06,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:06,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:06,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:06,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:12:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:06,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93143327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:06,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:06,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-07-13 20:12:06,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214017104] [2021-07-13 20:12:06,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:12:06,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:06,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:12:06,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:12:06,245 INFO L87 Difference]: Start difference. First operand 23462 states and 61625 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:13,972 INFO L93 Difference]: Finished difference Result 44417 states and 116031 transitions. [2021-07-13 20:12:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-07-13 20:12:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:14,082 INFO L225 Difference]: With dead ends: 44417 [2021-07-13 20:12:14,082 INFO L226 Difference]: Without dead ends: 43235 [2021-07-13 20:12:14,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13733 ImplicationChecksByTransitivity, 6066.6ms TimeCoverageRelationStatistics Valid=4150, Invalid=29890, Unknown=0, NotChecked=0, Total=34040 [2021-07-13 20:12:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43235 states. [2021-07-13 20:12:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43235 to 21862. [2021-07-13 20:12:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21862 states, 21861 states have (on average 2.6247198206852387) internal successors, (57379), 21861 states have internal predecessors, (57379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21862 states to 21862 states and 57379 transitions. [2021-07-13 20:12:14,715 INFO L78 Accepts]: Start accepts. Automaton has 21862 states and 57379 transitions. Word has length 43 [2021-07-13 20:12:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:14,715 INFO L482 AbstractCegarLoop]: Abstraction has 21862 states and 57379 transitions. [2021-07-13 20:12:14,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 21862 states and 57379 transitions. [2021-07-13 20:12:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:14,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:14,753 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:14,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:14,954 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:14,954 INFO L82 PathProgramCache]: Analyzing trace with hash 446049553, now seen corresponding path program 50 times [2021-07-13 20:12:14,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:14,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540283190] [2021-07-13 20:12:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:15,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:15,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540283190] [2021-07-13 20:12:15,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540283190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:15,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286328921] [2021-07-13 20:12:15,169 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 [2021-07-13 20:12:15,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:15,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:15,942 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:12:15,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:12:15,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:15,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:15,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:15,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:12:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:16,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286328921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:16,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:16,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-07-13 20:12:16,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161955069] [2021-07-13 20:12:16,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:12:16,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:16,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:12:16,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:12:16,021 INFO L87 Difference]: Start difference. First operand 21862 states and 57379 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:23,472 INFO L93 Difference]: Finished difference Result 52606 states and 136330 transitions. [2021-07-13 20:12:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-07-13 20:12:23,472 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:23,685 INFO L225 Difference]: With dead ends: 52606 [2021-07-13 20:12:23,686 INFO L226 Difference]: Without dead ends: 52287 [2021-07-13 20:12:23,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10927 ImplicationChecksByTransitivity, 6233.2ms TimeCoverageRelationStatistics Valid=3986, Invalid=26116, Unknown=0, NotChecked=0, Total=30102 [2021-07-13 20:12:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52287 states. [2021-07-13 20:12:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52287 to 22552. [2021-07-13 20:12:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22552 states, 22551 states have (on average 2.6213471686399714) internal successors, (59114), 22551 states have internal predecessors, (59114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22552 states to 22552 states and 59114 transitions. [2021-07-13 20:12:24,329 INFO L78 Accepts]: Start accepts. Automaton has 22552 states and 59114 transitions. Word has length 43 [2021-07-13 20:12:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:24,329 INFO L482 AbstractCegarLoop]: Abstraction has 22552 states and 59114 transitions. [2021-07-13 20:12:24,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 22552 states and 59114 transitions. [2021-07-13 20:12:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:24,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:24,365 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:24,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 20:12:24,581 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1890627837, now seen corresponding path program 51 times [2021-07-13 20:12:24,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:24,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969636171] [2021-07-13 20:12:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:12:24,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:24,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969636171] [2021-07-13 20:12:24,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969636171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:24,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010695090] [2021-07-13 20:12:24,804 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 [2021-07-13 20:12:24,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:12:24,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:24,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:24,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:25,391 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:12:25,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:12:25,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:25,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:12:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:25,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010695090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:25,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:25,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-07-13 20:12:25,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514454014] [2021-07-13 20:12:25,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:12:25,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:25,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:12:25,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:12:25,469 INFO L87 Difference]: Start difference. First operand 22552 states and 59114 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:27,019 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-07-13 20:12:30,333 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-07-13 20:12:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:32,813 INFO L93 Difference]: Finished difference Result 52725 states and 138064 transitions. [2021-07-13 20:12:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-13 20:12:32,814 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:32,946 INFO L225 Difference]: With dead ends: 52725 [2021-07-13 20:12:32,946 INFO L226 Difference]: Without dead ends: 52097 [2021-07-13 20:12:32,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11810 ImplicationChecksByTransitivity, 6006.8ms TimeCoverageRelationStatistics Valid=4212, Invalid=26940, Unknown=0, NotChecked=0, Total=31152 [2021-07-13 20:12:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52097 states. [2021-07-13 20:12:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52097 to 25356. [2021-07-13 20:12:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25356 states, 25355 states have (on average 2.6195227765726683) internal successors, (66418), 25355 states have internal predecessors, (66418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25356 states to 25356 states and 66418 transitions. [2021-07-13 20:12:33,732 INFO L78 Accepts]: Start accepts. Automaton has 25356 states and 66418 transitions. Word has length 43 [2021-07-13 20:12:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:33,732 INFO L482 AbstractCegarLoop]: Abstraction has 25356 states and 66418 transitions. [2021-07-13 20:12:33,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 25356 states and 66418 transitions. [2021-07-13 20:12:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:33,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:33,772 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:33,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 20:12:33,981 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:33,981 INFO L82 PathProgramCache]: Analyzing trace with hash 821149183, now seen corresponding path program 52 times [2021-07-13 20:12:33,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:33,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632250334] [2021-07-13 20:12:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:12:34,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:34,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632250334] [2021-07-13 20:12:34,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632250334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:34,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196721790] [2021-07-13 20:12:34,244 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 [2021-07-13 20:12:34,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:34,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:34,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:34,764 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:12:34,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:12:34,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:34,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:34,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:34,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:12:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:34,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196721790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:34,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:34,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-07-13 20:12:34,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535165706] [2021-07-13 20:12:34,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:12:34,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:12:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:12:34,828 INFO L87 Difference]: Start difference. First operand 25356 states and 66418 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:43,867 INFO L93 Difference]: Finished difference Result 51875 states and 136134 transitions. [2021-07-13 20:12:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-07-13 20:12:43,868 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:44,033 INFO L225 Difference]: With dead ends: 51875 [2021-07-13 20:12:44,033 INFO L226 Difference]: Without dead ends: 50985 [2021-07-13 20:12:44,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14878 ImplicationChecksByTransitivity, 6722.9ms TimeCoverageRelationStatistics Valid=4543, Invalid=33287, Unknown=0, NotChecked=0, Total=37830 [2021-07-13 20:12:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50985 states. [2021-07-13 20:12:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50985 to 30858. [2021-07-13 20:12:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30858 states, 30857 states have (on average 2.614868587354571) internal successors, (80687), 30857 states have internal predecessors, (80687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30858 states to 30858 states and 80687 transitions. [2021-07-13 20:12:45,030 INFO L78 Accepts]: Start accepts. Automaton has 30858 states and 80687 transitions. Word has length 43 [2021-07-13 20:12:45,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:45,031 INFO L482 AbstractCegarLoop]: Abstraction has 30858 states and 80687 transitions. [2021-07-13 20:12:45,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 30858 states and 80687 transitions. [2021-07-13 20:12:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:45,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:45,284 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:45,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:45,489 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1239161813, now seen corresponding path program 53 times [2021-07-13 20:12:45,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:45,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488187650] [2021-07-13 20:12:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:45,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:45,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488187650] [2021-07-13 20:12:45,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488187650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:45,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460206415] [2021-07-13 20:12:45,917 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 [2021-07-13 20:12:45,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:12:45,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:45,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:12:45,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:46,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:46,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:46,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-07-13 20:12:46,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:46,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:10 [2021-07-13 20:12:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:46,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460206415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:46,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:46,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:12:46,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178732995] [2021-07-13 20:12:46,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:12:46,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:12:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:12:46,939 INFO L87 Difference]: Start difference. First operand 30858 states and 80687 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:55,484 INFO L93 Difference]: Finished difference Result 76344 states and 199558 transitions. [2021-07-13 20:12:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-07-13 20:12:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:55,717 INFO L225 Difference]: With dead ends: 76344 [2021-07-13 20:12:55,717 INFO L226 Difference]: Without dead ends: 75918 [2021-07-13 20:12:55,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10917 ImplicationChecksByTransitivity, 6667.5ms TimeCoverageRelationStatistics Valid=3708, Invalid=26048, Unknown=0, NotChecked=0, Total=29756 [2021-07-13 20:12:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75918 states. [2021-07-13 20:12:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75918 to 34178. [2021-07-13 20:12:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34178 states, 34177 states have (on average 2.6042952863036546) internal successors, (89007), 34177 states have internal predecessors, (89007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34178 states to 34178 states and 89007 transitions. [2021-07-13 20:12:57,136 INFO L78 Accepts]: Start accepts. Automaton has 34178 states and 89007 transitions. Word has length 43 [2021-07-13 20:12:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:57,136 INFO L482 AbstractCegarLoop]: Abstraction has 34178 states and 89007 transitions. [2021-07-13 20:12:57,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 34178 states and 89007 transitions. [2021-07-13 20:12:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:57,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:57,188 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:57,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:57,401 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2064437585, now seen corresponding path program 54 times [2021-07-13 20:12:57,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:57,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367512614] [2021-07-13 20:12:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:57,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367512614] [2021-07-13 20:12:57,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367512614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146580769] [2021-07-13 20:12:57,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:57,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:12:57,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:57,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:12:57,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-07-13 20:12:58,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:58,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:58,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:58,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-07-13 20:12:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:58,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146580769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:58,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:58,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:12:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094315159] [2021-07-13 20:12:58,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:12:58,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:12:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:12:58,720 INFO L87 Difference]: Start difference. First operand 34178 states and 89007 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:05,526 INFO L93 Difference]: Finished difference Result 58808 states and 153180 transitions. [2021-07-13 20:13:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-07-13 20:13:05,527 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:13:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:05,711 INFO L225 Difference]: With dead ends: 58808 [2021-07-13 20:13:05,712 INFO L226 Difference]: Without dead ends: 58636 [2021-07-13 20:13:05,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 5542.9ms TimeCoverageRelationStatistics Valid=3127, Invalid=18925, Unknown=0, NotChecked=0, Total=22052 [2021-07-13 20:13:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58636 states. [2021-07-13 20:13:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58636 to 32974. [2021-07-13 20:13:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32974 states, 32973 states have (on average 2.6076790100991722) internal successors, (85983), 32973 states have internal predecessors, (85983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32974 states to 32974 states and 85983 transitions. [2021-07-13 20:13:06,880 INFO L78 Accepts]: Start accepts. Automaton has 32974 states and 85983 transitions. Word has length 43 [2021-07-13 20:13:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:06,880 INFO L482 AbstractCegarLoop]: Abstraction has 32974 states and 85983 transitions. [2021-07-13 20:13:06,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 32974 states and 85983 transitions. [2021-07-13 20:13:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:13:06,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:06,927 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:07,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 20:13:07,128 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash -16448189, now seen corresponding path program 55 times [2021-07-13 20:13:07,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:07,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962560910] [2021-07-13 20:13:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:13:07,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:07,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962560910] [2021-07-13 20:13:07,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962560910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:07,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144531231] [2021-07-13 20:13:07,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:07,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:13:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:07,934 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:13:07,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:13:07,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:07,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:07,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:07,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:13:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:08,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144531231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:08,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:08,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-07-13 20:13:08,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119117408] [2021-07-13 20:13:08,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:13:08,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:08,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:13:08,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:13:08,002 INFO L87 Difference]: Start difference. First operand 32974 states and 85983 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:13,603 INFO L93 Difference]: Finished difference Result 54518 states and 141071 transitions. [2021-07-13 20:13:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-07-13 20:13:13,603 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:13:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:13,728 INFO L225 Difference]: With dead ends: 54518 [2021-07-13 20:13:13,728 INFO L226 Difference]: Without dead ends: 54068 [2021-07-13 20:13:13,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8388 ImplicationChecksByTransitivity, 4523.8ms TimeCoverageRelationStatistics Valid=3168, Invalid=20088, Unknown=0, NotChecked=0, Total=23256 [2021-07-13 20:13:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54068 states. [2021-07-13 20:13:14,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54068 to 33126. [2021-07-13 20:13:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33126 states, 33125 states have (on average 2.6063396226415096) internal successors, (86335), 33125 states have internal predecessors, (86335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33126 states to 33126 states and 86335 transitions. [2021-07-13 20:13:14,502 INFO L78 Accepts]: Start accepts. Automaton has 33126 states and 86335 transitions. Word has length 43 [2021-07-13 20:13:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:14,502 INFO L482 AbstractCegarLoop]: Abstraction has 33126 states and 86335 transitions. [2021-07-13 20:13:14,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 33126 states and 86335 transitions. [2021-07-13 20:13:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:13:14,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:14,553 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:14,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:14,754 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:14,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash 768210755, now seen corresponding path program 56 times [2021-07-13 20:13:14,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:14,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531144880] [2021-07-13 20:13:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:14,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:14,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531144880] [2021-07-13 20:13:14,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531144880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:14,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629586551] [2021-07-13 20:13:14,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:15,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:15,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:13:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:15,724 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:13:15,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:13:15,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:15,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:15,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:15,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:13:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:15,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629586551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:15,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:15,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-07-13 20:13:15,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440835532] [2021-07-13 20:13:15,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:13:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:13:15,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:13:15,790 INFO L87 Difference]: Start difference. First operand 33126 states and 86335 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:22,504 INFO L93 Difference]: Finished difference Result 56520 states and 146433 transitions. [2021-07-13 20:13:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-13 20:13:22,504 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:13:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:22,622 INFO L225 Difference]: With dead ends: 56520 [2021-07-13 20:13:22,622 INFO L226 Difference]: Without dead ends: 56166 [2021-07-13 20:13:22,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11908 ImplicationChecksByTransitivity, 5374.1ms TimeCoverageRelationStatistics Valid=3892, Invalid=27260, Unknown=0, NotChecked=0, Total=31152 [2021-07-13 20:13:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56166 states. [2021-07-13 20:13:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56166 to 33074. [2021-07-13 20:13:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33074 states, 33073 states have (on average 2.6075650833005777) internal successors, (86240), 33073 states have internal predecessors, (86240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33074 states to 33074 states and 86240 transitions. [2021-07-13 20:13:23,429 INFO L78 Accepts]: Start accepts. Automaton has 33074 states and 86240 transitions. Word has length 43 [2021-07-13 20:13:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:23,429 INFO L482 AbstractCegarLoop]: Abstraction has 33074 states and 86240 transitions. [2021-07-13 20:13:23,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 33074 states and 86240 transitions. [2021-07-13 20:13:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:13:23,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:23,472 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:23,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:23,673 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:23,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1813418433, now seen corresponding path program 57 times [2021-07-13 20:13:23,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:23,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100484718] [2021-07-13 20:13:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:23,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:23,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100484718] [2021-07-13 20:13:23,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100484718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:23,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838378718] [2021-07-13 20:13:23,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:23,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:13:23,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:23,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:13:23,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:24,433 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-07-13 20:13:24,645 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:13:24,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:13:24,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:24,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:24,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:24,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:13:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:24,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838378718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:24,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:24,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:13:24,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006882859] [2021-07-13 20:13:24,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:13:24,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:24,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:13:24,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:13:24,727 INFO L87 Difference]: Start difference. First operand 33074 states and 86240 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:29,147 INFO L93 Difference]: Finished difference Result 51180 states and 133041 transitions. [2021-07-13 20:13:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:13:29,147 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:13:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:29,251 INFO L225 Difference]: With dead ends: 51180 [2021-07-13 20:13:29,251 INFO L226 Difference]: Without dead ends: 50194 [2021-07-13 20:13:29,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5914 ImplicationChecksByTransitivity, 3610.5ms TimeCoverageRelationStatistics Valid=2552, Invalid=15270, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 20:13:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50194 states. [2021-07-13 20:13:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50194 to 34498. [2021-07-13 20:13:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34498 states, 34497 states have (on average 2.606052700234803) internal successors, (89901), 34497 states have internal predecessors, (89901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34498 states to 34498 states and 89901 transitions. [2021-07-13 20:13:29,966 INFO L78 Accepts]: Start accepts. Automaton has 34498 states and 89901 transitions. Word has length 43 [2021-07-13 20:13:29,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:29,966 INFO L482 AbstractCegarLoop]: Abstraction has 34498 states and 89901 transitions. [2021-07-13 20:13:29,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:29,966 INFO L276 IsEmpty]: Start isEmpty. Operand 34498 states and 89901 transitions. [2021-07-13 20:13:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:13:30,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:30,015 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:30,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:30,216 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:30,216 INFO L82 PathProgramCache]: Analyzing trace with hash 835626841, now seen corresponding path program 58 times [2021-07-13 20:13:30,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:30,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908174271] [2021-07-13 20:13:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:30,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:30,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908174271] [2021-07-13 20:13:30,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908174271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:30,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869183578] [2021-07-13 20:13:30,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:30,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:30,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:30,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:13:30,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:31,129 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-07-13 20:13:31,363 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:13:31,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:13:31,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:31,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:31,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:31,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:13:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:31,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869183578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:31,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:31,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:13:31,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059181196] [2021-07-13 20:13:31,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:13:31,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:31,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:13:31,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:13:31,448 INFO L87 Difference]: Start difference. First operand 34498 states and 89901 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:38,697 INFO L93 Difference]: Finished difference Result 50970 states and 132040 transitions. [2021-07-13 20:13:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-07-13 20:13:38,698 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:13:38,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:38,856 INFO L225 Difference]: With dead ends: 50970 [2021-07-13 20:13:38,856 INFO L226 Difference]: Without dead ends: 50500 [2021-07-13 20:13:38,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9667 ImplicationChecksByTransitivity, 6109.6ms TimeCoverageRelationStatistics Valid=4304, Invalid=22756, Unknown=0, NotChecked=0, Total=27060 [2021-07-13 20:13:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50500 states. [2021-07-13 20:13:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50500 to 34480. [2021-07-13 20:13:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.6040198381623596) internal successors, (89784), 34479 states have internal predecessors, (89784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 89784 transitions. [2021-07-13 20:13:39,752 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 89784 transitions. Word has length 43 [2021-07-13 20:13:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:39,752 INFO L482 AbstractCegarLoop]: Abstraction has 34480 states and 89784 transitions. [2021-07-13 20:13:39,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 89784 transitions. [2021-07-13 20:13:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:13:39,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:39,815 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:40,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-13 20:13:40,015 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:40,016 INFO L82 PathProgramCache]: Analyzing trace with hash -155741057, now seen corresponding path program 59 times [2021-07-13 20:13:40,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:40,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063520192] [2021-07-13 20:13:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:40,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:40,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063520192] [2021-07-13 20:13:40,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063520192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:40,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313265845] [2021-07-13 20:13:40,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:40,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:13:40,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:13:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:41,194 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:13:41,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:13:41,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:41,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:41,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:41,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:13:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:41,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313265845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:41,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:41,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:13:41,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110682395] [2021-07-13 20:13:41,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:13:41,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:41,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:13:41,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:13:41,289 INFO L87 Difference]: Start difference. First operand 34480 states and 89784 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:46,933 INFO L93 Difference]: Finished difference Result 50258 states and 130327 transitions. [2021-07-13 20:13:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-07-13 20:13:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:13:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:47,032 INFO L225 Difference]: With dead ends: 50258 [2021-07-13 20:13:47,032 INFO L226 Difference]: Without dead ends: 49346 [2021-07-13 20:13:47,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7705 ImplicationChecksByTransitivity, 5291.7ms TimeCoverageRelationStatistics Valid=3493, Invalid=19157, Unknown=0, NotChecked=0, Total=22650 [2021-07-13 20:13:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49346 states. [2021-07-13 20:13:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49346 to 34988. [2021-07-13 20:13:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34988 states, 34987 states have (on average 2.5989939120244663) internal successors, (90931), 34987 states have internal predecessors, (90931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34988 states to 34988 states and 90931 transitions. [2021-07-13 20:13:47,731 INFO L78 Accepts]: Start accepts. Automaton has 34988 states and 90931 transitions. Word has length 43 [2021-07-13 20:13:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:47,731 INFO L482 AbstractCegarLoop]: Abstraction has 34988 states and 90931 transitions. [2021-07-13 20:13:47,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 34988 states and 90931 transitions. [2021-07-13 20:13:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:13:47,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:47,776 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:47,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:47,977 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1440813171, now seen corresponding path program 60 times [2021-07-13 20:13:47,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:47,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707175494] [2021-07-13 20:13:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:48,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:48,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707175494] [2021-07-13 20:13:48,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707175494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:48,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746922065] [2021-07-13 20:13:48,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:48,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:13:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:13:48,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:49,102 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:13:49,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:13:49,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:49,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:13:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:49,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746922065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:49,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:49,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:13:49,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373710525] [2021-07-13 20:13:49,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:13:49,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:13:49,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:13:49,181 INFO L87 Difference]: Start difference. First operand 34988 states and 90931 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:54,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:54,527 INFO L93 Difference]: Finished difference Result 66217 states and 172225 transitions. [2021-07-13 20:13:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-07-13 20:13:54,527 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:13:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:54,677 INFO L225 Difference]: With dead ends: 66217 [2021-07-13 20:13:54,678 INFO L226 Difference]: Without dead ends: 65095 [2021-07-13 20:13:54,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7329 ImplicationChecksByTransitivity, 4252.4ms TimeCoverageRelationStatistics Valid=2811, Invalid=18069, Unknown=0, NotChecked=0, Total=20880 [2021-07-13 20:13:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65095 states. [2021-07-13 20:13:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65095 to 36274. [2021-07-13 20:13:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36274 states, 36273 states have (on average 2.5966696992253193) internal successors, (94189), 36273 states have internal predecessors, (94189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36274 states to 36274 states and 94189 transitions. [2021-07-13 20:13:55,668 INFO L78 Accepts]: Start accepts. Automaton has 36274 states and 94189 transitions. Word has length 43 [2021-07-13 20:13:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:55,668 INFO L482 AbstractCegarLoop]: Abstraction has 36274 states and 94189 transitions. [2021-07-13 20:13:55,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 36274 states and 94189 transitions. [2021-07-13 20:13:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:13:55,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:55,721 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:55,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:55,935 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:55,935 INFO L82 PathProgramCache]: Analyzing trace with hash -421896627, now seen corresponding path program 61 times [2021-07-13 20:13:55,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:55,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113363420] [2021-07-13 20:13:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:56,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:56,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113363420] [2021-07-13 20:13:56,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113363420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:56,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258597122] [2021-07-13 20:13:56,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:56,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:13:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:56,736 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:13:56,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:13:56,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:56,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:56,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:56,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:13:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:56,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258597122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:56,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:56,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:13:56,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865965106] [2021-07-13 20:13:56,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:13:56,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:56,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:13:56,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:13:56,806 INFO L87 Difference]: Start difference. First operand 36274 states and 94189 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:04,140 INFO L93 Difference]: Finished difference Result 69190 states and 180203 transitions. [2021-07-13 20:14:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-07-13 20:14:04,140 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:14:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:04,383 INFO L225 Difference]: With dead ends: 69190 [2021-07-13 20:14:04,383 INFO L226 Difference]: Without dead ends: 68489 [2021-07-13 20:14:04,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11327 ImplicationChecksByTransitivity, 5556.3ms TimeCoverageRelationStatistics Valid=4164, Invalid=26636, Unknown=0, NotChecked=0, Total=30800 [2021-07-13 20:14:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68489 states. [2021-07-13 20:14:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68489 to 41444. [2021-07-13 20:14:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41444 states, 41443 states have (on average 2.5922109885867335) internal successors, (107429), 41443 states have internal predecessors, (107429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41444 states to 41444 states and 107429 transitions. [2021-07-13 20:14:05,398 INFO L78 Accepts]: Start accepts. Automaton has 41444 states and 107429 transitions. Word has length 43 [2021-07-13 20:14:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:05,399 INFO L482 AbstractCegarLoop]: Abstraction has 41444 states and 107429 transitions. [2021-07-13 20:14:05,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 41444 states and 107429 transitions. [2021-07-13 20:14:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:14:05,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:05,459 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:05,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:05,660 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:05,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1254279549, now seen corresponding path program 62 times [2021-07-13 20:14:05,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:05,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992347944] [2021-07-13 20:14:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:14:05,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:05,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992347944] [2021-07-13 20:14:05,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992347944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:05,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779855023] [2021-07-13 20:14:05,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:05,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:05,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:05,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:14:05,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:06,562 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:14:06,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:14:06,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:06,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:06,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:06,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:14:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:06,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779855023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:06,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:06,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:14:06,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819905456] [2021-07-13 20:14:06,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:14:06,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:06,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:14:06,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:14:06,654 INFO L87 Difference]: Start difference. First operand 41444 states and 107429 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:15,506 INFO L93 Difference]: Finished difference Result 82935 states and 213989 transitions. [2021-07-13 20:14:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-07-13 20:14:15,507 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:14:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:15,738 INFO L225 Difference]: With dead ends: 82935 [2021-07-13 20:14:15,738 INFO L226 Difference]: Without dead ends: 82258 [2021-07-13 20:14:15,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13846 ImplicationChecksByTransitivity, 7127.3ms TimeCoverageRelationStatistics Valid=5046, Invalid=32010, Unknown=0, NotChecked=0, Total=37056 [2021-07-13 20:14:15,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82258 states. [2021-07-13 20:14:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82258 to 42748. [2021-07-13 20:14:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42748 states, 42747 states have (on average 2.5865908718740496) internal successors, (110569), 42747 states have internal predecessors, (110569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42748 states to 42748 states and 110569 transitions. [2021-07-13 20:14:17,279 INFO L78 Accepts]: Start accepts. Automaton has 42748 states and 110569 transitions. Word has length 43 [2021-07-13 20:14:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:17,279 INFO L482 AbstractCegarLoop]: Abstraction has 42748 states and 110569 transitions. [2021-07-13 20:14:17,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 42748 states and 110569 transitions. [2021-07-13 20:14:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:14:17,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:17,344 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:17,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:17,544 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1888042687, now seen corresponding path program 63 times [2021-07-13 20:14:17,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:17,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828924855] [2021-07-13 20:14:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:14:17,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:17,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828924855] [2021-07-13 20:14:17,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828924855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:17,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353944280] [2021-07-13 20:14:17,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:17,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:14:17,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:14:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:18,410 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:14:18,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:14:18,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:18,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:18,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:18,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:14:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:18,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353944280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:18,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:18,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-07-13 20:14:18,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534166900] [2021-07-13 20:14:18,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:18,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:18,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:18,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:18,499 INFO L87 Difference]: Start difference. First operand 42748 states and 110569 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:24,370 INFO L93 Difference]: Finished difference Result 78182 states and 200986 transitions. [2021-07-13 20:14:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-07-13 20:14:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:14:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:24,541 INFO L225 Difference]: With dead ends: 78182 [2021-07-13 20:14:24,541 INFO L226 Difference]: Without dead ends: 77766 [2021-07-13 20:14:24,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9667 ImplicationChecksByTransitivity, 4701.9ms TimeCoverageRelationStatistics Valid=3303, Invalid=23103, Unknown=0, NotChecked=0, Total=26406 [2021-07-13 20:14:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77766 states. [2021-07-13 20:14:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77766 to 43178. [2021-07-13 20:14:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43178 states, 43177 states have (on average 2.5850568589758436) internal successors, (111615), 43177 states have internal predecessors, (111615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43178 states to 43178 states and 111615 transitions. [2021-07-13 20:14:25,714 INFO L78 Accepts]: Start accepts. Automaton has 43178 states and 111615 transitions. Word has length 43 [2021-07-13 20:14:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:25,714 INFO L482 AbstractCegarLoop]: Abstraction has 43178 states and 111615 transitions. [2021-07-13 20:14:25,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43178 states and 111615 transitions. [2021-07-13 20:14:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:14:26,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:26,029 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:26,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:26,245 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:26,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1766160425, now seen corresponding path program 64 times [2021-07-13 20:14:26,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:26,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965602444] [2021-07-13 20:14:26,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:14:26,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:26,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965602444] [2021-07-13 20:14:26,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965602444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:26,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525954817] [2021-07-13 20:14:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:26,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:26,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:26,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:14:26,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:26,823 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-13 20:14:27,117 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:14:27,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:14:27,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:27,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:27,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:27,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:14:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:27,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525954817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:27,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:27,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-07-13 20:14:27,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684400778] [2021-07-13 20:14:27,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:27,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:27,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:27,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:27,184 INFO L87 Difference]: Start difference. First operand 43178 states and 111615 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:32,578 INFO L93 Difference]: Finished difference Result 62543 states and 160562 transitions. [2021-07-13 20:14:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-07-13 20:14:32,578 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:14:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:32,714 INFO L225 Difference]: With dead ends: 62543 [2021-07-13 20:14:32,714 INFO L226 Difference]: Without dead ends: 62315 [2021-07-13 20:14:32,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9536 ImplicationChecksByTransitivity, 4645.2ms TimeCoverageRelationStatistics Valid=3394, Invalid=22046, Unknown=0, NotChecked=0, Total=25440 [2021-07-13 20:14:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62315 states. [2021-07-13 20:14:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62315 to 43786. [2021-07-13 20:14:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.582254196642686) internal successors, (113064), 43785 states have internal predecessors, (113064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 113064 transitions. [2021-07-13 20:14:33,797 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 113064 transitions. Word has length 43 [2021-07-13 20:14:33,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:33,797 INFO L482 AbstractCegarLoop]: Abstraction has 43786 states and 113064 transitions. [2021-07-13 20:14:33,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,798 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 113064 transitions. [2021-07-13 20:14:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:14:33,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:33,861 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:34,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:34,070 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:34,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1317965889, now seen corresponding path program 65 times [2021-07-13 20:14:34,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:34,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355244879] [2021-07-13 20:14:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:34,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:34,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355244879] [2021-07-13 20:14:34,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355244879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:34,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836135692] [2021-07-13 20:14:34,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:34,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:14:34,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:14:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:35,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:35,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:35,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:35,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:35,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:35,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:14:35,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:35,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:35,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:35,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:10 [2021-07-13 20:14:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:35,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836135692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:35,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:35,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:14:35,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49402190] [2021-07-13 20:14:35,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:14:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:14:35,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:14:35,272 INFO L87 Difference]: Start difference. First operand 43786 states and 113064 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:41,086 INFO L93 Difference]: Finished difference Result 61157 states and 157678 transitions. [2021-07-13 20:14:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-13 20:14:41,087 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:14:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:41,275 INFO L225 Difference]: With dead ends: 61157 [2021-07-13 20:14:41,275 INFO L226 Difference]: Without dead ends: 60050 [2021-07-13 20:14:41,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6467 ImplicationChecksByTransitivity, 4597.7ms TimeCoverageRelationStatistics Valid=2723, Invalid=16737, Unknown=0, NotChecked=0, Total=19460 [2021-07-13 20:14:41,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60050 states. [2021-07-13 20:14:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60050 to 44366. [2021-07-13 20:14:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44366 states, 44365 states have (on average 2.580637890228784) internal successors, (114490), 44365 states have internal predecessors, (114490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:42,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44366 states to 44366 states and 114490 transitions. [2021-07-13 20:14:42,568 INFO L78 Accepts]: Start accepts. Automaton has 44366 states and 114490 transitions. Word has length 43 [2021-07-13 20:14:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:42,568 INFO L482 AbstractCegarLoop]: Abstraction has 44366 states and 114490 transitions. [2021-07-13 20:14:42,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 44366 states and 114490 transitions. [2021-07-13 20:14:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:14:42,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:42,648 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:42,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 20:14:42,849 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1331079385, now seen corresponding path program 66 times [2021-07-13 20:14:42,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:42,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123987330] [2021-07-13 20:14:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:43,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:43,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123987330] [2021-07-13 20:14:43,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123987330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:43,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672091408] [2021-07-13 20:14:43,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:43,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:14:43,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:43,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:14:43,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:43,437 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-13 20:14:43,946 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:14:43,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:14:43,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:43,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:43,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:43,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:14:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:44,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672091408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:44,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:44,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:14:44,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364992723] [2021-07-13 20:14:44,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:14:44,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:44,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:14:44,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:14:44,031 INFO L87 Difference]: Start difference. First operand 44366 states and 114490 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:51,611 INFO L93 Difference]: Finished difference Result 59354 states and 152483 transitions. [2021-07-13 20:14:51,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-07-13 20:14:51,612 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:14:51,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:51,787 INFO L225 Difference]: With dead ends: 59354 [2021-07-13 20:14:51,787 INFO L226 Difference]: Without dead ends: 58884 [2021-07-13 20:14:51,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10503 ImplicationChecksByTransitivity, 6453.4ms TimeCoverageRelationStatistics Valid=4494, Invalid=24918, Unknown=0, NotChecked=0, Total=29412 [2021-07-13 20:14:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58884 states. [2021-07-13 20:14:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58884 to 44338. [2021-07-13 20:14:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44338 states, 44337 states have (on average 2.5801475065971986) internal successors, (114396), 44337 states have internal predecessors, (114396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44338 states to 44338 states and 114396 transitions. [2021-07-13 20:14:52,962 INFO L78 Accepts]: Start accepts. Automaton has 44338 states and 114396 transitions. Word has length 43 [2021-07-13 20:14:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:52,962 INFO L482 AbstractCegarLoop]: Abstraction has 44338 states and 114396 transitions. [2021-07-13 20:14:52,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 44338 states and 114396 transitions. [2021-07-13 20:14:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:14:53,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:53,044 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:53,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:53,244 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 339711487, now seen corresponding path program 67 times [2021-07-13 20:14:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:53,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441238368] [2021-07-13 20:14:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:53,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:53,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441238368] [2021-07-13 20:14:53,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441238368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:53,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580758212] [2021-07-13 20:14:53,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:53,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:14:53,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:54,167 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:14:54,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:14:54,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:54,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:54,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:54,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:14:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:54,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580758212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:54,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:54,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:14:54,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970834679] [2021-07-13 20:14:54,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:14:54,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:14:54,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:14:54,251 INFO L87 Difference]: Start difference. First operand 44338 states and 114396 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:54,673 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-07-13 20:15:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:01,118 INFO L93 Difference]: Finished difference Result 56803 states and 146198 transitions. [2021-07-13 20:15:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-13 20:15:01,119 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:01,291 INFO L225 Difference]: With dead ends: 56803 [2021-07-13 20:15:01,291 INFO L226 Difference]: Without dead ends: 56159 [2021-07-13 20:15:01,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7134 ImplicationChecksByTransitivity, 5805.4ms TimeCoverageRelationStatistics Valid=3364, Invalid=18392, Unknown=0, NotChecked=0, Total=21756 [2021-07-13 20:15:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56159 states. [2021-07-13 20:15:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56159 to 44676. [2021-07-13 20:15:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44676 states, 44675 states have (on average 2.5777504196978174) internal successors, (115161), 44675 states have internal predecessors, (115161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44676 states to 44676 states and 115161 transitions. [2021-07-13 20:15:02,649 INFO L78 Accepts]: Start accepts. Automaton has 44676 states and 115161 transitions. Word has length 43 [2021-07-13 20:15:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:02,649 INFO L482 AbstractCegarLoop]: Abstraction has 44676 states and 115161 transitions. [2021-07-13 20:15:02,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 44676 states and 115161 transitions. [2021-07-13 20:15:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:02,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:02,726 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:02,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:02,926 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:02,927 INFO L82 PathProgramCache]: Analyzing trace with hash -945360627, now seen corresponding path program 68 times [2021-07-13 20:15:02,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:02,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337616828] [2021-07-13 20:15:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:03,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:03,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337616828] [2021-07-13 20:15:03,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337616828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:03,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199017931] [2021-07-13 20:15:03,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:03,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:03,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:03,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:15:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:03,578 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-13 20:15:03,946 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:15:03,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:15:03,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:03,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:03,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:03,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:15:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:04,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199017931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:04,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:04,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:15:04,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003553262] [2021-07-13 20:15:04,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:15:04,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:04,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:15:04,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:15:04,022 INFO L87 Difference]: Start difference. First operand 44676 states and 115161 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:09,661 INFO L93 Difference]: Finished difference Result 67792 states and 175050 transitions. [2021-07-13 20:15:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-13 20:15:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:09,847 INFO L225 Difference]: With dead ends: 67792 [2021-07-13 20:15:09,847 INFO L226 Difference]: Without dead ends: 66797 [2021-07-13 20:15:09,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6148 ImplicationChecksByTransitivity, 4315.1ms TimeCoverageRelationStatistics Valid=2542, Invalid=15818, Unknown=0, NotChecked=0, Total=18360 [2021-07-13 20:15:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66797 states. [2021-07-13 20:15:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66797 to 47392. [2021-07-13 20:15:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47392 states, 47391 states have (on average 2.5755945221666563) internal successors, (122060), 47391 states have internal predecessors, (122060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47392 states to 47392 states and 122060 transitions. [2021-07-13 20:15:11,025 INFO L78 Accepts]: Start accepts. Automaton has 47392 states and 122060 transitions. Word has length 43 [2021-07-13 20:15:11,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:11,026 INFO L482 AbstractCegarLoop]: Abstraction has 47392 states and 122060 transitions. [2021-07-13 20:15:11,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:11,026 INFO L276 IsEmpty]: Start isEmpty. Operand 47392 states and 122060 transitions. [2021-07-13 20:15:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:11,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:11,100 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:11,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:11,301 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash 948961809, now seen corresponding path program 69 times [2021-07-13 20:15:11,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:11,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372262766] [2021-07-13 20:15:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:11,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372262766] [2021-07-13 20:15:11,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372262766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116686644] [2021-07-13 20:15:11,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:11,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:15:11,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:11,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:15:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:12,333 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:15:12,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:15:12,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:12,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:12,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:12,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:15:12,567 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 5 [2021-07-13 20:15:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:12,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116686644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:12,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:12,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-07-13 20:15:12,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035393423] [2021-07-13 20:15:12,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:15:12,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:12,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:15:12,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:15:12,579 INFO L87 Difference]: Start difference. First operand 47392 states and 122060 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:20,645 INFO L93 Difference]: Finished difference Result 72464 states and 186435 transitions. [2021-07-13 20:15:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-13 20:15:20,646 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:20,850 INFO L225 Difference]: With dead ends: 72464 [2021-07-13 20:15:20,851 INFO L226 Difference]: Without dead ends: 71461 [2021-07-13 20:15:20,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12076 ImplicationChecksByTransitivity, 6689.3ms TimeCoverageRelationStatistics Valid=4790, Invalid=27790, Unknown=0, NotChecked=0, Total=32580 [2021-07-13 20:15:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71461 states. [2021-07-13 20:15:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71461 to 48146. [2021-07-13 20:15:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48146 states, 48145 states have (on average 2.5708796344376363) internal successors, (123775), 48145 states have internal predecessors, (123775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48146 states to 48146 states and 123775 transitions. [2021-07-13 20:15:22,330 INFO L78 Accepts]: Start accepts. Automaton has 48146 states and 123775 transitions. Word has length 43 [2021-07-13 20:15:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:22,330 INFO L482 AbstractCegarLoop]: Abstraction has 48146 states and 123775 transitions. [2021-07-13 20:15:22,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 48146 states and 123775 transitions. [2021-07-13 20:15:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:22,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:22,413 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:22,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 20:15:22,614 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1074030681, now seen corresponding path program 70 times [2021-07-13 20:15:22,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:22,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682328012] [2021-07-13 20:15:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:22,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:22,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682328012] [2021-07-13 20:15:22,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682328012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:22,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50552921] [2021-07-13 20:15:22,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:22,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:22,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:22,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:15:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:23,544 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:15:23,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:15:23,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:23,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:23,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:23,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:15:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:23,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50552921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:23,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:23,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:15:23,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349880312] [2021-07-13 20:15:23,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:15:23,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:23,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:15:23,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:15:23,619 INFO L87 Difference]: Start difference. First operand 48146 states and 123775 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:30,523 INFO L93 Difference]: Finished difference Result 100466 states and 258593 transitions. [2021-07-13 20:15:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-07-13 20:15:30,524 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:30,875 INFO L225 Difference]: With dead ends: 100466 [2021-07-13 20:15:30,875 INFO L226 Difference]: Without dead ends: 99703 [2021-07-13 20:15:30,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10642 ImplicationChecksByTransitivity, 5331.5ms TimeCoverageRelationStatistics Valid=3660, Invalid=25410, Unknown=0, NotChecked=0, Total=29070 [2021-07-13 20:15:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99703 states. [2021-07-13 20:15:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99703 to 50130. [2021-07-13 20:15:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.5679546769335118) internal successors, (128729), 50129 states have internal predecessors, (128729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 128729 transitions. [2021-07-13 20:15:32,996 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 128729 transitions. Word has length 43 [2021-07-13 20:15:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:32,996 INFO L482 AbstractCegarLoop]: Abstraction has 50130 states and 128729 transitions. [2021-07-13 20:15:32,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 128729 transitions. [2021-07-13 20:15:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:33,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:33,079 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:33,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-07-13 20:15:33,281 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:33,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:33,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1488545191, now seen corresponding path program 71 times [2021-07-13 20:15:33,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:33,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921166607] [2021-07-13 20:15:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:33,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:33,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921166607] [2021-07-13 20:15:33,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921166607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:33,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420022454] [2021-07-13 20:15:33,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:33,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:15:33,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:15:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:34,317 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:15:34,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:15:34,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:34,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:34,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:34,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:15:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:34,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420022454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:34,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:34,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:15:34,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147265697] [2021-07-13 20:15:34,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:15:34,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:34,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:15:34,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:15:34,395 INFO L87 Difference]: Start difference. First operand 50130 states and 128729 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:44,923 INFO L93 Difference]: Finished difference Result 91246 states and 235782 transitions. [2021-07-13 20:15:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-07-13 20:15:44,923 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:45,210 INFO L225 Difference]: With dead ends: 91246 [2021-07-13 20:15:45,210 INFO L226 Difference]: Without dead ends: 90154 [2021-07-13 20:15:45,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17867 ImplicationChecksByTransitivity, 8168.8ms TimeCoverageRelationStatistics Valid=5977, Invalid=39605, Unknown=0, NotChecked=0, Total=45582 [2021-07-13 20:15:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90154 states. [2021-07-13 20:15:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90154 to 47190. [2021-07-13 20:15:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47190 states, 47189 states have (on average 2.5532009578503465) internal successors, (120483), 47189 states have internal predecessors, (120483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47190 states to 47190 states and 120483 transitions. [2021-07-13 20:15:46,936 INFO L78 Accepts]: Start accepts. Automaton has 47190 states and 120483 transitions. Word has length 43 [2021-07-13 20:15:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:46,936 INFO L482 AbstractCegarLoop]: Abstraction has 47190 states and 120483 transitions. [2021-07-13 20:15:46,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 47190 states and 120483 transitions. [2021-07-13 20:15:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:47,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:47,018 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:47,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:47,219 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:47,219 INFO L82 PathProgramCache]: Analyzing trace with hash -78287429, now seen corresponding path program 72 times [2021-07-13 20:15:47,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:47,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025066926] [2021-07-13 20:15:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:15:47,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:47,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025066926] [2021-07-13 20:15:47,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025066926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:47,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152975381] [2021-07-13 20:15:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:47,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:15:47,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:15:47,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:48,254 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:15:48,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:15:48,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:48,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:48,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:48,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:15:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:48,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152975381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:48,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:48,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-07-13 20:15:48,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59401344] [2021-07-13 20:15:48,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:15:48,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:48,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:15:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:15:48,329 INFO L87 Difference]: Start difference. First operand 47190 states and 120483 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:54,273 INFO L93 Difference]: Finished difference Result 66174 states and 167928 transitions. [2021-07-13 20:15:54,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-13 20:15:54,273 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:54,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:54,485 INFO L225 Difference]: With dead ends: 66174 [2021-07-13 20:15:54,485 INFO L226 Difference]: Without dead ends: 65870 [2021-07-13 20:15:54,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7907 ImplicationChecksByTransitivity, 5056.6ms TimeCoverageRelationStatistics Valid=3106, Invalid=18946, Unknown=0, NotChecked=0, Total=22052 [2021-07-13 20:15:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65870 states. [2021-07-13 20:15:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65870 to 46632. [2021-07-13 20:15:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46632 states, 46631 states have (on average 2.554995603782891) internal successors, (119142), 46631 states have internal predecessors, (119142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46632 states to 46632 states and 119142 transitions. [2021-07-13 20:15:55,812 INFO L78 Accepts]: Start accepts. Automaton has 46632 states and 119142 transitions. Word has length 43 [2021-07-13 20:15:55,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:55,812 INFO L482 AbstractCegarLoop]: Abstraction has 46632 states and 119142 transitions. [2021-07-13 20:15:55,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 46632 states and 119142 transitions. [2021-07-13 20:15:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:55,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:55,896 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:56,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-13 20:15:56,097 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1134775143, now seen corresponding path program 73 times [2021-07-13 20:15:56,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:56,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586085848] [2021-07-13 20:15:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:15:56,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:56,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586085848] [2021-07-13 20:15:56,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586085848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:56,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444657179] [2021-07-13 20:15:56,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:56,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:15:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:56,982 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:15:56,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:15:56,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:56,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:56,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:56,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:15:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:57,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444657179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:57,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:57,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:15:57,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878477018] [2021-07-13 20:15:57,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:15:57,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:57,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:15:57,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:15:57,269 INFO L87 Difference]: Start difference. First operand 46632 states and 119142 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:58,343 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-07-13 20:16:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:02,611 INFO L93 Difference]: Finished difference Result 72140 states and 184136 transitions. [2021-07-13 20:16:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-07-13 20:16:02,611 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:02,808 INFO L225 Difference]: With dead ends: 72140 [2021-07-13 20:16:02,808 INFO L226 Difference]: Without dead ends: 71943 [2021-07-13 20:16:02,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7253 ImplicationChecksByTransitivity, 4278.0ms TimeCoverageRelationStatistics Valid=2368, Invalid=17938, Unknown=0, NotChecked=0, Total=20306 [2021-07-13 20:16:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71943 states. [2021-07-13 20:16:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71943 to 47146. [2021-07-13 20:16:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47146 states, 47145 states have (on average 2.5532506098207657) internal successors, (120373), 47145 states have internal predecessors, (120373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47146 states to 47146 states and 120373 transitions. [2021-07-13 20:16:04,373 INFO L78 Accepts]: Start accepts. Automaton has 47146 states and 120373 transitions. Word has length 43 [2021-07-13 20:16:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:04,373 INFO L482 AbstractCegarLoop]: Abstraction has 47146 states and 120373 transitions. [2021-07-13 20:16:04,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 47146 states and 120373 transitions. [2021-07-13 20:16:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:04,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:04,477 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:04,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 20:16:04,678 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash 335639619, now seen corresponding path program 74 times [2021-07-13 20:16:04,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:04,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427371395] [2021-07-13 20:16:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:16:04,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:04,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427371395] [2021-07-13 20:16:04,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427371395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:04,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027665396] [2021-07-13 20:16:04,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:04,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:04,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:04,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:16:04,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:05,602 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:16:05,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:16:05,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:05,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:05,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:05,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:16:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:05,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027665396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:05,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:05,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:16:05,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589965081] [2021-07-13 20:16:05,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:16:05,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:05,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:16:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:16:05,685 INFO L87 Difference]: Start difference. First operand 47146 states and 120373 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:10,511 INFO L93 Difference]: Finished difference Result 74152 states and 188777 transitions. [2021-07-13 20:16:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-07-13 20:16:10,512 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:10,668 INFO L225 Difference]: With dead ends: 74152 [2021-07-13 20:16:10,668 INFO L226 Difference]: Without dead ends: 74010 [2021-07-13 20:16:10,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8025 ImplicationChecksByTransitivity, 4023.8ms TimeCoverageRelationStatistics Valid=2577, Invalid=19475, Unknown=0, NotChecked=0, Total=22052 [2021-07-13 20:16:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74010 states. [2021-07-13 20:16:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74010 to 47166. [2021-07-13 20:16:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47166 states, 47165 states have (on average 2.5532280292589844) internal successors, (120423), 47165 states have internal predecessors, (120423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47166 states to 47166 states and 120423 transitions. [2021-07-13 20:16:11,908 INFO L78 Accepts]: Start accepts. Automaton has 47166 states and 120423 transitions. Word has length 43 [2021-07-13 20:16:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:11,908 INFO L482 AbstractCegarLoop]: Abstraction has 47166 states and 120423 transitions. [2021-07-13 20:16:11,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 47166 states and 120423 transitions. [2021-07-13 20:16:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:11,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:11,969 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:12,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-13 20:16:12,170 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1122185933, now seen corresponding path program 75 times [2021-07-13 20:16:12,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:12,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445696355] [2021-07-13 20:16:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:16:12,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:12,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445696355] [2021-07-13 20:16:12,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445696355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:12,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119454871] [2021-07-13 20:16:12,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:12,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:16:12,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:12,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:16:12,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:12,994 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:16:12,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:16:12,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:12,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:13,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:13,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:16:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:13,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119454871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:13,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:13,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:16:13,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004032292] [2021-07-13 20:16:13,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:16:13,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:13,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:16:13,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:16:13,063 INFO L87 Difference]: Start difference. First operand 47166 states and 120423 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:13,444 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-07-13 20:16:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:18,207 INFO L93 Difference]: Finished difference Result 63023 states and 160770 transitions. [2021-07-13 20:16:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-07-13 20:16:18,207 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:18,386 INFO L225 Difference]: With dead ends: 63023 [2021-07-13 20:16:18,386 INFO L226 Difference]: Without dead ends: 62729 [2021-07-13 20:16:18,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8120 ImplicationChecksByTransitivity, 4066.6ms TimeCoverageRelationStatistics Valid=2461, Invalid=19591, Unknown=0, NotChecked=0, Total=22052 [2021-07-13 20:16:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62729 states. [2021-07-13 20:16:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62729 to 47330. [2021-07-13 20:16:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47330 states, 47329 states have (on average 2.5527900441589724) internal successors, (120821), 47329 states have internal predecessors, (120821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:19,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47330 states to 47330 states and 120821 transitions. [2021-07-13 20:16:19,736 INFO L78 Accepts]: Start accepts. Automaton has 47330 states and 120821 transitions. Word has length 43 [2021-07-13 20:16:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:19,736 INFO L482 AbstractCegarLoop]: Abstraction has 47330 states and 120821 transitions. [2021-07-13 20:16:19,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 47330 states and 120821 transitions. [2021-07-13 20:16:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:19,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:19,821 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:20,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:20,021 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:20,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1278458927, now seen corresponding path program 76 times [2021-07-13 20:16:20,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:20,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221243510] [2021-07-13 20:16:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:16:20,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:20,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221243510] [2021-07-13 20:16:20,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221243510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:20,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291425521] [2021-07-13 20:16:20,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:20,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:20,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:20,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:16:20,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:21,088 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-13 20:16:21,099 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:16:21,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:16:21,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:21,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:21,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:21,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:16:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:21,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291425521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:21,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:21,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:16:21,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417736283] [2021-07-13 20:16:21,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:16:21,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:21,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:16:21,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:16:21,185 INFO L87 Difference]: Start difference. First operand 47330 states and 120821 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:26,599 INFO L93 Difference]: Finished difference Result 64330 states and 163895 transitions. [2021-07-13 20:16:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-13 20:16:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:26,789 INFO L225 Difference]: With dead ends: 64330 [2021-07-13 20:16:26,789 INFO L226 Difference]: Without dead ends: 64041 [2021-07-13 20:16:26,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7628 ImplicationChecksByTransitivity, 4526.0ms TimeCoverageRelationStatistics Valid=2403, Invalid=18477, Unknown=0, NotChecked=0, Total=20880 [2021-07-13 20:16:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64041 states. [2021-07-13 20:16:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64041 to 47290. [2021-07-13 20:16:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47290 states, 47289 states have (on average 2.5528346972868956) internal successors, (120721), 47289 states have internal predecessors, (120721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47290 states to 47290 states and 120721 transitions. [2021-07-13 20:16:28,148 INFO L78 Accepts]: Start accepts. Automaton has 47290 states and 120721 transitions. Word has length 43 [2021-07-13 20:16:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:28,148 INFO L482 AbstractCegarLoop]: Abstraction has 47290 states and 120721 transitions. [2021-07-13 20:16:28,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 47290 states and 120721 transitions. [2021-07-13 20:16:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:28,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:28,223 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:28,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-13 20:16:28,424 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash 191955835, now seen corresponding path program 77 times [2021-07-13 20:16:28,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:28,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179827270] [2021-07-13 20:16:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:16:29,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:29,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179827270] [2021-07-13 20:16:29,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179827270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:29,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121704638] [2021-07-13 20:16:29,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:29,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:16:29,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:29,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:16:29,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:29,639 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:16:29,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:16:29,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:29,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:29,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:29,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:16:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:29,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121704638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:29,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:29,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:16:29,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872068348] [2021-07-13 20:16:29,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:16:29,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:16:29,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:16:29,723 INFO L87 Difference]: Start difference. First operand 47290 states and 120721 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:29,908 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:16:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:34,818 INFO L93 Difference]: Finished difference Result 65796 states and 167500 transitions. [2021-07-13 20:16:34,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-07-13 20:16:34,818 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:34,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:34,947 INFO L225 Difference]: With dead ends: 65796 [2021-07-13 20:16:34,947 INFO L226 Difference]: Without dead ends: 65562 [2021-07-13 20:16:34,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 4426.9ms TimeCoverageRelationStatistics Valid=2614, Invalid=20036, Unknown=0, NotChecked=0, Total=22650 [2021-07-13 20:16:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65562 states. [2021-07-13 20:16:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65562 to 47298. [2021-07-13 20:16:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47298 states, 47297 states have (on average 2.5528257606190667) internal successors, (120741), 47297 states have internal predecessors, (120741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47298 states to 47298 states and 120741 transitions. [2021-07-13 20:16:36,149 INFO L78 Accepts]: Start accepts. Automaton has 47298 states and 120741 transitions. Word has length 43 [2021-07-13 20:16:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:36,150 INFO L482 AbstractCegarLoop]: Abstraction has 47298 states and 120741 transitions. [2021-07-13 20:16:36,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 47298 states and 120741 transitions. [2021-07-13 20:16:36,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:36,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:36,214 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:36,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-13 20:16:36,414 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:36,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2025140471, now seen corresponding path program 78 times [2021-07-13 20:16:36,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:36,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821142747] [2021-07-13 20:16:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:16:36,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:36,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821142747] [2021-07-13 20:16:36,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821142747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:36,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378127021] [2021-07-13 20:16:36,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:36,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:16:36,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:36,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:16:36,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:36,976 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-13 20:16:37,337 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:16:37,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:16:37,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:37,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:37,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:37,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:16:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:37,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378127021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:37,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:37,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:16:37,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720880058] [2021-07-13 20:16:37,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:16:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:16:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:16:37,408 INFO L87 Difference]: Start difference. First operand 47298 states and 120741 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:42,729 INFO L93 Difference]: Finished difference Result 61026 states and 155120 transitions. [2021-07-13 20:16:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-07-13 20:16:42,729 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:42,863 INFO L225 Difference]: With dead ends: 61026 [2021-07-13 20:16:42,863 INFO L226 Difference]: Without dead ends: 60852 [2021-07-13 20:16:42,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10710 ImplicationChecksByTransitivity, 4330.1ms TimeCoverageRelationStatistics Valid=3227, Invalid=24829, Unknown=0, NotChecked=0, Total=28056 [2021-07-13 20:16:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60852 states. [2021-07-13 20:16:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60852 to 47304. [2021-07-13 20:16:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47304 states, 47303 states have (on average 2.5528190601018963) internal successors, (120756), 47303 states have internal predecessors, (120756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47304 states to 47304 states and 120756 transitions. [2021-07-13 20:16:44,016 INFO L78 Accepts]: Start accepts. Automaton has 47304 states and 120756 transitions. Word has length 43 [2021-07-13 20:16:44,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:44,016 INFO L482 AbstractCegarLoop]: Abstraction has 47304 states and 120756 transitions. [2021-07-13 20:16:44,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 47304 states and 120756 transitions. [2021-07-13 20:16:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:44,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:44,082 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:44,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-13 20:16:44,282 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:44,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2141102477, now seen corresponding path program 79 times [2021-07-13 20:16:44,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:44,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223940723] [2021-07-13 20:16:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:16:44,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:44,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223940723] [2021-07-13 20:16:44,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223940723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:44,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25008432] [2021-07-13 20:16:44,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:44,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:16:44,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:45,166 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:16:45,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:16:45,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:45,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:45,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:45,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:16:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:45,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25008432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:45,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:45,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:16:45,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75543171] [2021-07-13 20:16:45,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:16:45,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:45,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:16:45,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:16:45,234 INFO L87 Difference]: Start difference. First operand 47304 states and 120756 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:49,341 INFO L93 Difference]: Finished difference Result 56783 states and 144456 transitions. [2021-07-13 20:16:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-07-13 20:16:49,342 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:49,478 INFO L225 Difference]: With dead ends: 56783 [2021-07-13 20:16:49,478 INFO L226 Difference]: Without dead ends: 56701 [2021-07-13 20:16:49,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7607 ImplicationChecksByTransitivity, 3673.5ms TimeCoverageRelationStatistics Valid=2455, Invalid=18137, Unknown=0, NotChecked=0, Total=20592 [2021-07-13 20:16:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56701 states. [2021-07-13 20:16:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56701 to 47304. [2021-07-13 20:16:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47304 states, 47303 states have (on average 2.5528190601018963) internal successors, (120756), 47303 states have internal predecessors, (120756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47304 states to 47304 states and 120756 transitions. [2021-07-13 20:16:50,618 INFO L78 Accepts]: Start accepts. Automaton has 47304 states and 120756 transitions. Word has length 43 [2021-07-13 20:16:50,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:50,618 INFO L482 AbstractCegarLoop]: Abstraction has 47304 states and 120756 transitions. [2021-07-13 20:16:50,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 47304 states and 120756 transitions. [2021-07-13 20:16:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:50,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:50,685 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:50,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:50,886 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:50,886 INFO L82 PathProgramCache]: Analyzing trace with hash -610205491, now seen corresponding path program 80 times [2021-07-13 20:16:50,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:50,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765531516] [2021-07-13 20:16:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:16:51,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:51,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765531516] [2021-07-13 20:16:51,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765531516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:51,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417017234] [2021-07-13 20:16:51,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:51,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:51,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:16:51,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:51,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:51,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:51,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:51,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:51,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:51,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:51,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-07-13 20:16:51,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:51,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:51,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:51,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-07-13 20:16:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:51,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417017234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:51,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:51,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:16:51,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492457248] [2021-07-13 20:16:51,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:16:51,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:51,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:16:51,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:16:51,865 INFO L87 Difference]: Start difference. First operand 47304 states and 120756 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:52,217 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-07-13 20:17:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:01,435 INFO L93 Difference]: Finished difference Result 70608 states and 179724 transitions. [2021-07-13 20:17:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-07-13 20:17:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:17:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:01,635 INFO L225 Difference]: With dead ends: 70608 [2021-07-13 20:17:01,635 INFO L226 Difference]: Without dead ends: 69991 [2021-07-13 20:17:01,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19698 ImplicationChecksByTransitivity, 7292.6ms TimeCoverageRelationStatistics Valid=5051, Invalid=44901, Unknown=0, NotChecked=0, Total=49952 [2021-07-13 20:17:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69991 states. [2021-07-13 20:17:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69991 to 47428. [2021-07-13 20:17:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47428 states, 47427 states have (on average 2.5528918126805404) internal successors, (121076), 47427 states have internal predecessors, (121076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47428 states to 47428 states and 121076 transitions. [2021-07-13 20:17:03,091 INFO L78 Accepts]: Start accepts. Automaton has 47428 states and 121076 transitions. Word has length 43 [2021-07-13 20:17:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:03,091 INFO L482 AbstractCegarLoop]: Abstraction has 47428 states and 121076 transitions. [2021-07-13 20:17:03,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 47428 states and 121076 transitions. [2021-07-13 20:17:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:17:03,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:03,179 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:03,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-13 20:17:03,379 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2146818217, now seen corresponding path program 81 times [2021-07-13 20:17:03,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:03,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988022421] [2021-07-13 20:17:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:03,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:03,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988022421] [2021-07-13 20:17:03,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988022421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:03,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578742222] [2021-07-13 20:17:03,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:03,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:17:03,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:17:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:04,490 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:17:04,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:17:04,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:04,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:04,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:04,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:17:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:04,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578742222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:04,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:04,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:17:04,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730331816] [2021-07-13 20:17:04,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:04,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:04,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:04,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:04,568 INFO L87 Difference]: Start difference. First operand 47428 states and 121076 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:06,019 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-07-13 20:17:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:13,926 INFO L93 Difference]: Finished difference Result 69796 states and 177489 transitions. [2021-07-13 20:17:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-07-13 20:17:13,931 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:17:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:14,235 INFO L225 Difference]: With dead ends: 69796 [2021-07-13 20:17:14,235 INFO L226 Difference]: Without dead ends: 69406 [2021-07-13 20:17:14,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21210 ImplicationChecksByTransitivity, 7627.2ms TimeCoverageRelationStatistics Valid=5217, Invalid=46995, Unknown=0, NotChecked=0, Total=52212 [2021-07-13 20:17:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69406 states. [2021-07-13 20:17:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69406 to 47466. [2021-07-13 20:17:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47466 states, 47465 states have (on average 2.552933740651006) internal successors, (121175), 47465 states have internal predecessors, (121175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47466 states to 47466 states and 121175 transitions. [2021-07-13 20:17:15,711 INFO L78 Accepts]: Start accepts. Automaton has 47466 states and 121175 transitions. Word has length 43 [2021-07-13 20:17:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:15,711 INFO L482 AbstractCegarLoop]: Abstraction has 47466 states and 121175 transitions. [2021-07-13 20:17:15,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand 47466 states and 121175 transitions. [2021-07-13 20:17:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:17:15,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:15,795 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:15,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:15,996 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash -314964443, now seen corresponding path program 82 times [2021-07-13 20:17:15,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:15,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719225035] [2021-07-13 20:17:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:16,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:16,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719225035] [2021-07-13 20:17:16,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719225035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:16,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107063450] [2021-07-13 20:17:16,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:16,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:16,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:16,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:17:16,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:16,817 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:17:16,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:17:16,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:16,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:16,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:16,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:17:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:16,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107063450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:16,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:16,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:17:16,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281526438] [2021-07-13 20:17:16,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:16,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:16,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:16,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:16,885 INFO L87 Difference]: Start difference. First operand 47466 states and 121175 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:17,749 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-07-13 20:17:18,867 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-13 20:17:24,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:24,522 INFO L93 Difference]: Finished difference Result 67405 states and 171230 transitions. [2021-07-13 20:17:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-07-13 20:17:24,522 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:17:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:24,674 INFO L225 Difference]: With dead ends: 67405 [2021-07-13 20:17:24,674 INFO L226 Difference]: Without dead ends: 67187 [2021-07-13 20:17:24,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21733 ImplicationChecksByTransitivity, 6317.9ms TimeCoverageRelationStatistics Valid=5437, Invalid=46775, Unknown=0, NotChecked=0, Total=52212 [2021-07-13 20:17:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67187 states. [2021-07-13 20:17:25,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67187 to 47470. [2021-07-13 20:17:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47470 states, 47469 states have (on average 2.552887147401462) internal successors, (121183), 47469 states have internal predecessors, (121183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47470 states to 47470 states and 121183 transitions. [2021-07-13 20:17:25,923 INFO L78 Accepts]: Start accepts. Automaton has 47470 states and 121183 transitions. Word has length 43 [2021-07-13 20:17:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:25,923 INFO L482 AbstractCegarLoop]: Abstraction has 47470 states and 121183 transitions. [2021-07-13 20:17:25,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 47470 states and 121183 transitions. [2021-07-13 20:17:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:17:25,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:25,979 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:26,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:26,180 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:26,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1363490135, now seen corresponding path program 83 times [2021-07-13 20:17:26,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:26,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463419427] [2021-07-13 20:17:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:17:26,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:26,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463419427] [2021-07-13 20:17:26,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463419427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:26,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016045727] [2021-07-13 20:17:26,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:26,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:17:26,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:26,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:17:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:26,992 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:17:26,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:17:26,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:26,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:26,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:26,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:17:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:27,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016045727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:27,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:27,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:17:27,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251992003] [2021-07-13 20:17:27,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:27,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:27,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:27,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:27,060 INFO L87 Difference]: Start difference. First operand 47470 states and 121183 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:36,362 INFO L93 Difference]: Finished difference Result 85613 states and 217148 transitions. [2021-07-13 20:17:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2021-07-13 20:17:36,362 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:17:36,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:36,544 INFO L225 Difference]: With dead ends: 85613 [2021-07-13 20:17:36,544 INFO L226 Difference]: Without dead ends: 85251 [2021-07-13 20:17:36,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32674 ImplicationChecksByTransitivity, 7542.7ms TimeCoverageRelationStatistics Valid=7362, Invalid=68538, Unknown=0, NotChecked=0, Total=75900 [2021-07-13 20:17:36,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85251 states. [2021-07-13 20:17:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85251 to 51758. [2021-07-13 20:17:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51758 states, 51757 states have (on average 2.551461638039299) internal successors, (132056), 51757 states have internal predecessors, (132056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51758 states to 51758 states and 132056 transitions. [2021-07-13 20:17:37,873 INFO L78 Accepts]: Start accepts. Automaton has 51758 states and 132056 transitions. Word has length 43 [2021-07-13 20:17:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:37,873 INFO L482 AbstractCegarLoop]: Abstraction has 51758 states and 132056 transitions. [2021-07-13 20:17:37,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 51758 states and 132056 transitions. [2021-07-13 20:17:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:17:37,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:37,945 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:38,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-13 20:17:38,146 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:38,146 INFO L82 PathProgramCache]: Analyzing trace with hash -663449007, now seen corresponding path program 84 times [2021-07-13 20:17:38,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:38,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740450216] [2021-07-13 20:17:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:17:38,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:38,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740450216] [2021-07-13 20:17:38,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740450216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:38,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410114629] [2021-07-13 20:17:38,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:38,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:17:38,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:38,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:17:38,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:39,195 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:17:39,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:17:39,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:39,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:39,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:39,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:17:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:39,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410114629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:39,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:39,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:17:39,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503362378] [2021-07-13 20:17:39,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:17:39,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:39,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:17:39,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:17:39,263 INFO L87 Difference]: Start difference. First operand 51758 states and 132056 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:45,199 INFO L93 Difference]: Finished difference Result 77822 states and 198068 transitions. [2021-07-13 20:17:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-07-13 20:17:45,199 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:17:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:45,363 INFO L225 Difference]: With dead ends: 77822 [2021-07-13 20:17:45,363 INFO L226 Difference]: Without dead ends: 77358 [2021-07-13 20:17:45,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12809 ImplicationChecksByTransitivity, 4916.5ms TimeCoverageRelationStatistics Valid=3379, Invalid=29927, Unknown=0, NotChecked=0, Total=33306 [2021-07-13 20:17:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77358 states. [2021-07-13 20:17:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77358 to 51884. [2021-07-13 20:17:46,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51884 states, 51883 states have (on average 2.5517221440548927) internal successors, (132391), 51883 states have internal predecessors, (132391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51884 states to 51884 states and 132391 transitions. [2021-07-13 20:17:46,588 INFO L78 Accepts]: Start accepts. Automaton has 51884 states and 132391 transitions. Word has length 43 [2021-07-13 20:17:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:46,588 INFO L482 AbstractCegarLoop]: Abstraction has 51884 states and 132391 transitions. [2021-07-13 20:17:46,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 51884 states and 132391 transitions. [2021-07-13 20:17:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:17:46,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:46,654 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:46,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-13 20:17:46,855 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:46,855 INFO L82 PathProgramCache]: Analyzing trace with hash 806965755, now seen corresponding path program 85 times [2021-07-13 20:17:46,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:46,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022083678] [2021-07-13 20:17:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:17:47,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:47,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022083678] [2021-07-13 20:17:47,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022083678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:47,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138307125] [2021-07-13 20:17:47,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:47,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:17:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:47,367 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:17:47,847 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:17:47,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:17:47,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:47,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:47,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:47,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:17:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:47,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138307125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:47,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:47,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:17:47,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328038912] [2021-07-13 20:17:47,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:17:47,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:47,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:17:47,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:17:47,919 INFO L87 Difference]: Start difference. First operand 51884 states and 132391 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:48,266 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-07-13 20:17:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:55,919 INFO L93 Difference]: Finished difference Result 75873 states and 192774 transitions. [2021-07-13 20:17:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-07-13 20:17:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:17:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:56,151 INFO L225 Difference]: With dead ends: 75873 [2021-07-13 20:17:56,151 INFO L226 Difference]: Without dead ends: 75565 [2021-07-13 20:17:56,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17790 ImplicationChecksByTransitivity, 6420.7ms TimeCoverageRelationStatistics Valid=4551, Invalid=40181, Unknown=0, NotChecked=0, Total=44732 [2021-07-13 20:17:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75565 states. [2021-07-13 20:17:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75565 to 51854. [2021-07-13 20:17:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51854 states, 51853 states have (on average 2.551250650878445) internal successors, (132290), 51853 states have internal predecessors, (132290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51854 states to 51854 states and 132290 transitions. [2021-07-13 20:17:57,601 INFO L78 Accepts]: Start accepts. Automaton has 51854 states and 132290 transitions. Word has length 43 [2021-07-13 20:17:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:57,601 INFO L482 AbstractCegarLoop]: Abstraction has 51854 states and 132290 transitions. [2021-07-13 20:17:57,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 51854 states and 132290 transitions. [2021-07-13 20:17:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:17:57,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:57,674 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:57,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:57,874 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:57,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1654816905, now seen corresponding path program 86 times [2021-07-13 20:17:57,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:57,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544948623] [2021-07-13 20:17:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:17:58,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:58,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544948623] [2021-07-13 20:17:58,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544948623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:58,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698018047] [2021-07-13 20:17:58,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:58,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:17:58,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:17:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:58,707 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:17:58,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:17:58,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:58,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:58,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:58,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:17:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:58,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698018047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:58,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:58,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:17:58,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139475486] [2021-07-13 20:17:58,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:17:58,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:58,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:17:58,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:17:58,779 INFO L87 Difference]: Start difference. First operand 51854 states and 132290 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:05,525 INFO L93 Difference]: Finished difference Result 74637 states and 189395 transitions. [2021-07-13 20:18:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-07-13 20:18:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:18:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:05,689 INFO L225 Difference]: With dead ends: 74637 [2021-07-13 20:18:05,689 INFO L226 Difference]: Without dead ends: 74393 [2021-07-13 20:18:05,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16287 ImplicationChecksByTransitivity, 5747.1ms TimeCoverageRelationStatistics Valid=4561, Invalid=36445, Unknown=0, NotChecked=0, Total=41006 [2021-07-13 20:18:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74393 states. [2021-07-13 20:18:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74393 to 51872. [2021-07-13 20:18:06,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51872 states, 51871 states have (on average 2.551232866148715) internal successors, (132335), 51871 states have internal predecessors, (132335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51872 states to 51872 states and 132335 transitions. [2021-07-13 20:18:06,964 INFO L78 Accepts]: Start accepts. Automaton has 51872 states and 132335 transitions. Word has length 43 [2021-07-13 20:18:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:06,964 INFO L482 AbstractCegarLoop]: Abstraction has 51872 states and 132335 transitions. [2021-07-13 20:18:06,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 51872 states and 132335 transitions. [2021-07-13 20:18:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:18:07,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:07,039 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:07,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:07,240 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:07,240 INFO L82 PathProgramCache]: Analyzing trace with hash -252245953, now seen corresponding path program 87 times [2021-07-13 20:18:07,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:07,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310823767] [2021-07-13 20:18:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:18:07,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:07,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310823767] [2021-07-13 20:18:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310823767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:07,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556024256] [2021-07-13 20:18:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:07,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:18:07,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:07,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:18:07,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:08,023 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:18:08,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:18:08,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:08,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:08,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:08,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:18:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:08,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556024256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:08,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:08,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:18:08,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180943397] [2021-07-13 20:18:08,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:08,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:08,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:08,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:08,109 INFO L87 Difference]: Start difference. First operand 51872 states and 132335 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:08,332 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-07-13 20:18:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:13,778 INFO L93 Difference]: Finished difference Result 69212 states and 175696 transitions. [2021-07-13 20:18:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-07-13 20:18:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:18:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:13,957 INFO L225 Difference]: With dead ends: 69212 [2021-07-13 20:18:13,957 INFO L226 Difference]: Without dead ends: 69130 [2021-07-13 20:18:13,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12857 ImplicationChecksByTransitivity, 4838.5ms TimeCoverageRelationStatistics Valid=3678, Invalid=28542, Unknown=0, NotChecked=0, Total=32220 [2021-07-13 20:18:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69130 states. [2021-07-13 20:18:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69130 to 51878. [2021-07-13 20:18:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51878 states, 51877 states have (on average 2.551226940648071) internal successors, (132350), 51877 states have internal predecessors, (132350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51878 states to 51878 states and 132350 transitions. [2021-07-13 20:18:15,391 INFO L78 Accepts]: Start accepts. Automaton has 51878 states and 132350 transitions. Word has length 43 [2021-07-13 20:18:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:15,391 INFO L482 AbstractCegarLoop]: Abstraction has 51878 states and 132350 transitions. [2021-07-13 20:18:15,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 51878 states and 132350 transitions. [2021-07-13 20:18:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:18:15,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:15,707 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:15,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-13 20:18:15,908 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:15,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1416733651, now seen corresponding path program 88 times [2021-07-13 20:18:15,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:15,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441697928] [2021-07-13 20:18:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:18:16,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:16,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441697928] [2021-07-13 20:18:16,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441697928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:16,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399643794] [2021-07-13 20:18:16,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:16,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:16,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:16,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:18:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:16,845 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:18:16,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:18:16,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:16,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:16,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:16,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:18:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:16,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399643794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:16,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:16,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-07-13 20:18:16,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69258322] [2021-07-13 20:18:16,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:16,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:16,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:16,914 INFO L87 Difference]: Start difference. First operand 51878 states and 132350 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:26,140 INFO L93 Difference]: Finished difference Result 89690 states and 227050 transitions. [2021-07-13 20:18:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-07-13 20:18:26,140 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:18:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:26,418 INFO L225 Difference]: With dead ends: 89690 [2021-07-13 20:18:26,419 INFO L226 Difference]: Without dead ends: 89290 [2021-07-13 20:18:26,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26996 ImplicationChecksByTransitivity, 7623.8ms TimeCoverageRelationStatistics Valid=6679, Invalid=58091, Unknown=0, NotChecked=0, Total=64770 [2021-07-13 20:18:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89290 states. [2021-07-13 20:18:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89290 to 54716. [2021-07-13 20:18:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54716 states, 54715 states have (on average 2.5474184410125194) internal successors, (139382), 54715 states have internal predecessors, (139382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54716 states to 54716 states and 139382 transitions. [2021-07-13 20:18:28,187 INFO L78 Accepts]: Start accepts. Automaton has 54716 states and 139382 transitions. Word has length 43 [2021-07-13 20:18:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:28,187 INFO L482 AbstractCegarLoop]: Abstraction has 54716 states and 139382 transitions. [2021-07-13 20:18:28,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 54716 states and 139382 transitions. [2021-07-13 20:18:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:18:28,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:28,566 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:28,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:28,777 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash -368011059, now seen corresponding path program 89 times [2021-07-13 20:18:28,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:28,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683865508] [2021-07-13 20:18:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:18:29,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:29,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683865508] [2021-07-13 20:18:29,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683865508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:29,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571154842] [2021-07-13 20:18:29,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:29,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:18:29,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:29,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:18:29,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:29,789 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:18:29,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-07-13 20:18:29,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:29,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:29,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:29,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 20:18:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:29,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571154842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:29,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:29,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:18:29,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442630999] [2021-07-13 20:18:29,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:18:29,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:29,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:18:29,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:18:29,868 INFO L87 Difference]: Start difference. First operand 54716 states and 139382 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:35,512 INFO L93 Difference]: Finished difference Result 84710 states and 215092 transitions. [2021-07-13 20:18:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-07-13 20:18:35,513 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:18:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:35,820 INFO L225 Difference]: With dead ends: 84710 [2021-07-13 20:18:35,820 INFO L226 Difference]: Without dead ends: 84396 [2021-07-13 20:18:35,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8959 ImplicationChecksByTransitivity, 4669.5ms TimeCoverageRelationStatistics Valid=3092, Invalid=21088, Unknown=0, NotChecked=0, Total=24180 [2021-07-13 20:18:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84396 states. [2021-07-13 20:18:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84396 to 55026. [2021-07-13 20:18:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55026 states, 55025 states have (on average 2.5467878237164925) internal successors, (140137), 55025 states have internal predecessors, (140137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55026 states to 55026 states and 140137 transitions. [2021-07-13 20:18:37,114 INFO L78 Accepts]: Start accepts. Automaton has 55026 states and 140137 transitions. Word has length 43 [2021-07-13 20:18:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:37,114 INFO L482 AbstractCegarLoop]: Abstraction has 55026 states and 140137 transitions. [2021-07-13 20:18:37,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 55026 states and 140137 transitions. [2021-07-13 20:18:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:18:37,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:37,382 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:37,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:37,597 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1102403703, now seen corresponding path program 90 times [2021-07-13 20:18:37,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:37,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777585908] [2021-07-13 20:18:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:18:37,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:37,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777585908] [2021-07-13 20:18:37,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777585908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:37,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963717427] [2021-07-13 20:18:37,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:37,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:18:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:37,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:18:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:38,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-07-13 20:18:38,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:38,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:38,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:38,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-07-13 20:18:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:38,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963717427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:38,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:38,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-07-13 20:18:38,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186340798] [2021-07-13 20:18:38,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:18:38,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:18:38,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:18:38,657 INFO L87 Difference]: Start difference. First operand 55026 states and 140137 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:45,348 INFO L93 Difference]: Finished difference Result 96340 states and 244151 transitions. [2021-07-13 20:18:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-07-13 20:18:45,349 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:18:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:45,673 INFO L225 Difference]: With dead ends: 96340 [2021-07-13 20:18:45,673 INFO L226 Difference]: Without dead ends: 95949 [2021-07-13 20:18:45,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10517 ImplicationChecksByTransitivity, 5349.1ms TimeCoverageRelationStatistics Valid=3570, Invalid=24822, Unknown=0, NotChecked=0, Total=28392 [2021-07-13 20:18:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95949 states. Received shutdown request... [2021-07-13 20:18:46,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:46,246 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:18:46,248 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:18:46,249 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:18:46,249 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:18:46 BasicIcfg [2021-07-13 20:18:46,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:18:46,250 INFO L168 Benchmark]: Toolchain (without parser) took 753460.02 ms. Allocated memory was 192.9 MB in the beginning and 6.0 GB in the end (delta: 5.8 GB). Free memory was 172.8 MB in the beginning and 3.4 GB in the end (delta: -3.2 GB). Peak memory consumption was 2.7 GB. Max. memory is 8.0 GB. [2021-07-13 20:18:46,250 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 192.9 MB. Free memory is still 173.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:18:46,250 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.50 ms. Allocated memory is still 192.9 MB. Free memory was 172.8 MB in the beginning and 171.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:18:46,250 INFO L168 Benchmark]: Boogie Preprocessor took 13.68 ms. Allocated memory is still 192.9 MB. Free memory was 171.3 MB in the beginning and 170.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:46,250 INFO L168 Benchmark]: RCFGBuilder took 211.14 ms. Allocated memory is still 192.9 MB. Free memory was 170.3 MB in the beginning and 157.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:46,250 INFO L168 Benchmark]: TraceAbstraction took 753205.92 ms. Allocated memory was 192.9 MB in the beginning and 6.0 GB in the end (delta: 5.8 GB). Free memory was 157.0 MB in the beginning and 3.4 GB in the end (delta: -3.2 GB). Peak memory consumption was 2.6 GB. Max. memory is 8.0 GB. [2021-07-13 20:18:46,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 192.9 MB. Free memory is still 173.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.50 ms. Allocated memory is still 192.9 MB. Free memory was 172.8 MB in the beginning and 171.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.68 ms. Allocated memory is still 192.9 MB. Free memory was 171.3 MB in the beginning and 170.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 211.14 ms. Allocated memory is still 192.9 MB. Free memory was 170.3 MB in the beginning and 157.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 753205.92 ms. Allocated memory was 192.9 MB in the beginning and 6.0 GB in the end (delta: 5.8 GB). Free memory was 157.0 MB in the beginning and 3.4 GB in the end (delta: -3.2 GB). Peak memory consumption was 2.6 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 753105.8ms, OverallIterations: 93, TraceHistogramMax: 4, EmptinessCheckTime: 4467.6ms, AutomataDifference: 586486.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7581 SDtfs, 56926 SDslu, 134641 SDs, 0 SdLazy, 238421 SolverSat, 25669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 132970.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16442 GetRequests, 2385 SyntacticMatches, 42 SemanticMatches, 14015 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926001 ImplicationChecksByTransitivity, 454622.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55026occurred in iteration=92, InterpolantAutomatonStates: 11412, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59870.2ms AutomataMinimizationTime, 93 MinimizatonAttempts, 1394218 StatesRemovedByMinimization, 89 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 410.7ms SsaConstructionTime, 1402.4ms SatisfiabilityAnalysisTime, 79237.5ms InterpolantComputationTime, 7392 NumberOfCodeBlocks, 7392 NumberOfCodeBlocksAsserted, 383 NumberOfCheckSat, 7209 ConstructedInterpolants, 181 QuantifiedInterpolants, 122311 SizeOfPredicates, 680 NumberOfNonLiveVariables, 8996 ConjunctsInSsa, 2747 ConjunctsInUnsatCore, 183 InterpolantComputations, 3 PerfectInterpolantSequences, 316/6699 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown