/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:27:25,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:27:25,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:27:25,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 23:27:25,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 23:27:25,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 23:27:25,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 23:27:25,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 23:27:25,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 23:27:25,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 23:27:25,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 23:27:25,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 23:27:25,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 23:27:25,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 23:27:25,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 23:27:25,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 23:27:25,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 23:27:25,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 23:27:25,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 23:27:25,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 23:27:25,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 23:27:25,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 23:27:25,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 23:27:25,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 23:27:25,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 23:27:25,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 23:27:25,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 23:27:25,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 23:27:25,143 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 [2021-03-10 23:27:25,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:27:25,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:27:25,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:27:25,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:27:25,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:27:25,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:27:25,177 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:27:25,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:27:25,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:27:25,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:27:25,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:27:25,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:27:25,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:27:25,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:27:25,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:27:25,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:27:25,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:27:25,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:27:25,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:27:25,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:27:25,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:27:25,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:27:25,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:27:25,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:27:25,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:27:25,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:27:25,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:27:25,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:27:25,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:27:25,180 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:27:25,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:27:25,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:27:25,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:27:25,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:27:25,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:27:25,452 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:27:25,452 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:27:25,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl [2021-03-10 23:27:25,453 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl' [2021-03-10 23:27:25,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:27:25,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:27:25,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:27:25,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:27:25,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:27:25,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/1) ... [2021-03-10 23:27:25,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/1) ... [2021-03-10 23:27:25,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:27:25,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:27:25,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:27:25,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:27:25,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/1) ... [2021-03-10 23:27:25,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/1) ... [2021-03-10 23:27:25,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/1) ... [2021-03-10 23:27:25,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/1) ... [2021-03-10 23:27:25,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/1) ... [2021-03-10 23:27:25,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/1) ... [2021-03-10 23:27:25,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/1) ... [2021-03-10 23:27:25,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:27:25,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:27:25,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:27:25,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:27:25,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (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 [2021-03-10 23:27:25,584 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:27:25,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:27:25,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:27:25,585 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:27:25,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:27:25,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:27:25,585 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:27:25,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:27:25,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:27:25,585 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 23:27:25,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 23:27:25,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 23:27:25,586 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:27:25,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:27:25,727 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 23:27:25,728 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:27:25 BoogieIcfgContainer [2021-03-10 23:27:25,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:27:25,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:27:25,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:27:25,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:27:25,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:25" (1/2) ... [2021-03-10 23:27:25,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2170edca and model type dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:27:25, skipping insertion in model container [2021-03-10 23:27:25,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:27:25" (2/2) ... [2021-03-10 23:27:25,733 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-alt.wvr.bpl [2021-03-10 23:27:25,736 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:27:25,737 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:27:25,739 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:27:25,739 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:27:25,769 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 23:27:25,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 23:27:25,799 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:27:25,799 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:27:25,799 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:27:25,800 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:27:25,800 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:27:25,800 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:27:25,800 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:27:25,800 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:27:25,822 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-03-10 23:27:25,847 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:27:25,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:25,856 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:25,856 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:25,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:25,860 INFO L82 PathProgramCache]: Analyzing trace with hash 761048342, now seen corresponding path program 1 times [2021-03-10 23:27:25,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:25,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118439097] [2021-03-10 23:27:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:25,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118439097] [2021-03-10 23:27:25,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:27:25,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:27:25,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638987276] [2021-03-10 23:27:25,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:27:25,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:25,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:27:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:27:25,979 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:26,024 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-03-10 23:27:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:27:26,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:27:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:26,033 INFO L225 Difference]: With dead ends: 298 [2021-03-10 23:27:26,034 INFO L226 Difference]: Without dead ends: 283 [2021-03-10 23:27:26,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:27:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-03-10 23:27:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-03-10 23:27:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-03-10 23:27:26,086 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-03-10 23:27:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:26,087 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-03-10 23:27:26,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-03-10 23:27:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:27:26,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:26,089 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:26,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:27:26,089 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:26,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1631630015, now seen corresponding path program 1 times [2021-03-10 23:27:26,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:26,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691706217] [2021-03-10 23:27:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:26,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691706217] [2021-03-10 23:27:26,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:27:26,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:27:26,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040968962] [2021-03-10 23:27:26,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:27:26,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:26,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:27:26,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:27:26,142 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:26,194 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2021-03-10 23:27:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:27:26,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:27:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:26,210 INFO L225 Difference]: With dead ends: 249 [2021-03-10 23:27:26,210 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 23:27:26,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:27:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 23:27:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-03-10 23:27:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2021-03-10 23:27:26,225 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2021-03-10 23:27:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:26,226 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2021-03-10 23:27:26,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2021-03-10 23:27:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:27:26,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:26,227 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:26,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 23:27:26,227 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:26,228 INFO L82 PathProgramCache]: Analyzing trace with hash 691559827, now seen corresponding path program 1 times [2021-03-10 23:27:26,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:26,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300900595] [2021-03-10 23:27:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:26,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300900595] [2021-03-10 23:27:26,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:27:26,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:27:26,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597647749] [2021-03-10 23:27:26,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:27:26,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:27:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:27:26,270 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:26,328 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2021-03-10 23:27:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:27:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:27:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:26,332 INFO L225 Difference]: With dead ends: 332 [2021-03-10 23:27:26,333 INFO L226 Difference]: Without dead ends: 332 [2021-03-10 23:27:26,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:27:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-03-10 23:27:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2021-03-10 23:27:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2021-03-10 23:27:26,357 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2021-03-10 23:27:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:26,358 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2021-03-10 23:27:26,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2021-03-10 23:27:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:26,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:26,359 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:26,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 23:27:26,360 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:26,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:26,360 INFO L82 PathProgramCache]: Analyzing trace with hash -312129144, now seen corresponding path program 1 times [2021-03-10 23:27:26,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:26,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035973036] [2021-03-10 23:27:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:26,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035973036] [2021-03-10 23:27:26,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999273986] [2021-03-10 23:27:26,755 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 [2021-03-10 23:27:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:26,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:26,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:27,049 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-03-10 23:27:27,050 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 66 [2021-03-10 23:27:27,064 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:27,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:27,079 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-03-10 23:27:27,080 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2021-03-10 23:27:27,093 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:27,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:27,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2021-03-10 23:27:27,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:27,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:27,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:27,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:75, output treesize:3 [2021-03-10 23:27:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:27,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:27,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 23:27:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596974513] [2021-03-10 23:27:27,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:27,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:27,151 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-03-10 23:27:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:27,453 INFO L93 Difference]: Finished difference Result 426 states and 1215 transitions. [2021-03-10 23:27:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:27:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:27,455 INFO L225 Difference]: With dead ends: 426 [2021-03-10 23:27:27,455 INFO L226 Difference]: Without dead ends: 411 [2021-03-10 23:27:27,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:27:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-03-10 23:27:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 346. [2021-03-10 23:27:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2021-03-10 23:27:27,465 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2021-03-10 23:27:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:27,465 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2021-03-10 23:27:27,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-03-10 23:27:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2021-03-10 23:27:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:27,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:27,467 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:27,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:27,683 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:27,684 INFO L82 PathProgramCache]: Analyzing trace with hash -611353494, now seen corresponding path program 2 times [2021-03-10 23:27:27,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:27,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124593552] [2021-03-10 23:27:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:27,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124593552] [2021-03-10 23:27:27,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022379345] [2021-03-10 23:27:27,903 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 [2021-03-10 23:27:27,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:27,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:28,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:28,100 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 73 [2021-03-10 23:27:28,124 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:28,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:28,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:28,147 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-03-10 23:27:28,210 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:28,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:28,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:28,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 50 [2021-03-10 23:27:28,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 23:27:28,286 INFO L628 ElimStorePlain]: treesize reduction 24, result has 67.6 percent of original size [2021-03-10 23:27:28,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:27:28,298 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:21 [2021-03-10 23:27:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:28,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:28,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 23:27:28,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118279263] [2021-03-10 23:27:28,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:28,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:28,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:28,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:28,343 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:29,025 INFO L93 Difference]: Finished difference Result 669 states and 1914 transitions. [2021-03-10 23:27:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:27:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:29,029 INFO L225 Difference]: With dead ends: 669 [2021-03-10 23:27:29,029 INFO L226 Difference]: Without dead ends: 639 [2021-03-10 23:27:29,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 682.0ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:27:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-03-10 23:27:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 368. [2021-03-10 23:27:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.915531335149864) internal successors, (1070), 367 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1070 transitions. [2021-03-10 23:27:29,039 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1070 transitions. Word has length 24 [2021-03-10 23:27:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:29,039 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1070 transitions. [2021-03-10 23:27:29,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1070 transitions. [2021-03-10 23:27:29,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:29,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:29,040 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:29,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:29,257 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:29,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:29,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1585830426, now seen corresponding path program 3 times [2021-03-10 23:27:29,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:29,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603121806] [2021-03-10 23:27:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:29,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603121806] [2021-03-10 23:27:29,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496022957] [2021-03-10 23:27:29,529 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 [2021-03-10 23:27:29,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:27:29,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:29,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:27:29,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:29,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:29,645 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 71 [2021-03-10 23:27:29,679 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:29,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:29,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:29,694 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 65 [2021-03-10 23:27:29,735 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:29,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:29,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:29,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 48 [2021-03-10 23:27:29,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 23:27:29,800 INFO L628 ElimStorePlain]: treesize reduction 33, result has 50.7 percent of original size [2021-03-10 23:27:29,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:29,805 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-03-10 23:27:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:29,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:29,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-03-10 23:27:29,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832737818] [2021-03-10 23:27:29,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:29,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:29,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:29,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:29,860 INFO L87 Difference]: Start difference. First operand 368 states and 1070 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-03-10 23:27:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:30,557 INFO L93 Difference]: Finished difference Result 754 states and 2192 transitions. [2021-03-10 23:27:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:27:30,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:30,561 INFO L225 Difference]: With dead ends: 754 [2021-03-10 23:27:30,561 INFO L226 Difference]: Without dead ends: 739 [2021-03-10 23:27:30,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:27:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-03-10 23:27:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 366. [2021-03-10 23:27:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9342465753424656) internal successors, (1071), 365 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1071 transitions. [2021-03-10 23:27:30,571 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1071 transitions. Word has length 24 [2021-03-10 23:27:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:30,571 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1071 transitions. [2021-03-10 23:27:30,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-03-10 23:27:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1071 transitions. [2021-03-10 23:27:30,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:30,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:30,572 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:30,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 23:27:30,785 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:30,786 INFO L82 PathProgramCache]: Analyzing trace with hash 416827498, now seen corresponding path program 4 times [2021-03-10 23:27:30,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:30,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377636739] [2021-03-10 23:27:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:30,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377636739] [2021-03-10 23:27:30,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735214279] [2021-03-10 23:27:30,942 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 [2021-03-10 23:27:30,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:30,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:30,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:27:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:31,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-03-10 23:27:31,039 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:31,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 23:27:31,047 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:31,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-10 23:27:31,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:31,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:31,061 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-03-10 23:27:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:31,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:31,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-10 23:27:31,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680833331] [2021-03-10 23:27:31,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:31,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:31,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:31,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:31,085 INFO L87 Difference]: Start difference. First operand 366 states and 1071 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:31,293 INFO L93 Difference]: Finished difference Result 558 states and 1607 transitions. [2021-03-10 23:27:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:27:31,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:31,296 INFO L225 Difference]: With dead ends: 558 [2021-03-10 23:27:31,296 INFO L226 Difference]: Without dead ends: 543 [2021-03-10 23:27:31,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-03-10 23:27:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 382. [2021-03-10 23:27:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.916010498687664) internal successors, (1111), 381 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1111 transitions. [2021-03-10 23:27:31,304 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1111 transitions. Word has length 24 [2021-03-10 23:27:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:31,304 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1111 transitions. [2021-03-10 23:27:31,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1111 transitions. [2021-03-10 23:27:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:31,305 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:31,305 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:31,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:31,520 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2079136470, now seen corresponding path program 5 times [2021-03-10 23:27:31,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:31,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084054463] [2021-03-10 23:27:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:31,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084054463] [2021-03-10 23:27:31,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003490960] [2021-03-10 23:27:31,702 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 [2021-03-10 23:27:31,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:31,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:27:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:31,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,859 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 27 treesize of output 31 [2021-03-10 23:27:31,882 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:31,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-03-10 23:27:31,933 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:31,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 23 [2021-03-10 23:27:31,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:27:31,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:31,998 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:36, output treesize:45 [2021-03-10 23:27:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:32,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:32,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 23:27:32,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411761737] [2021-03-10 23:27:32,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:32,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:32,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:32,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:32,086 INFO L87 Difference]: Start difference. First operand 382 states and 1111 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:32,465 INFO L93 Difference]: Finished difference Result 692 states and 2022 transitions. [2021-03-10 23:27:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:27:32,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:32,469 INFO L225 Difference]: With dead ends: 692 [2021-03-10 23:27:32,469 INFO L226 Difference]: Without dead ends: 677 [2021-03-10 23:27:32,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:27:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-03-10 23:27:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 390. [2021-03-10 23:27:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9383033419023135) internal successors, (1143), 389 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1143 transitions. [2021-03-10 23:27:32,479 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1143 transitions. Word has length 24 [2021-03-10 23:27:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:32,479 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1143 transitions. [2021-03-10 23:27:32,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1143 transitions. [2021-03-10 23:27:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:32,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:32,481 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:32,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 23:27:32,695 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash 504651029, now seen corresponding path program 6 times [2021-03-10 23:27:32,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:32,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005653696] [2021-03-10 23:27:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:32,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005653696] [2021-03-10 23:27:32,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465866343] [2021-03-10 23:27:32,730 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:32,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:27:32,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:32,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:32,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:32,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:32,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:32,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129602813] [2021-03-10 23:27:32,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:32,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:32,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:32,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:32,835 INFO L87 Difference]: Start difference. First operand 390 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:33,203 INFO L93 Difference]: Finished difference Result 1186 states and 3456 transitions. [2021-03-10 23:27:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:27:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:33,207 INFO L225 Difference]: With dead ends: 1186 [2021-03-10 23:27:33,207 INFO L226 Difference]: Without dead ends: 1186 [2021-03-10 23:27:33,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:27:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-03-10 23:27:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 509. [2021-03-10 23:27:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.0688976377952755) internal successors, (1559), 508 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1559 transitions. [2021-03-10 23:27:33,219 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1559 transitions. Word has length 27 [2021-03-10 23:27:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:33,220 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 1559 transitions. [2021-03-10 23:27:33,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1559 transitions. [2021-03-10 23:27:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:33,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:33,221 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:33,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:33,437 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:33,438 INFO L82 PathProgramCache]: Analyzing trace with hash 993171717, now seen corresponding path program 7 times [2021-03-10 23:27:33,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:33,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50249999] [2021-03-10 23:27:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:33,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50249999] [2021-03-10 23:27:33,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4290669] [2021-03-10 23:27:33,496 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) [2021-03-10 23:27:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:33,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:33,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:33,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:33,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:33,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098457727] [2021-03-10 23:27:33,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:33,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:33,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:33,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:33,626 INFO L87 Difference]: Start difference. First operand 509 states and 1559 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:34,470 INFO L93 Difference]: Finished difference Result 2025 states and 5753 transitions. [2021-03-10 23:27:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:27:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:34,477 INFO L225 Difference]: With dead ends: 2025 [2021-03-10 23:27:34,477 INFO L226 Difference]: Without dead ends: 2025 [2021-03-10 23:27:34,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:27:34,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-03-10 23:27:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 515. [2021-03-10 23:27:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.0914396887159534) internal successors, (1589), 514 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1589 transitions. [2021-03-10 23:27:34,494 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1589 transitions. Word has length 27 [2021-03-10 23:27:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:34,494 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1589 transitions. [2021-03-10 23:27:34,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1589 transitions. [2021-03-10 23:27:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:34,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:34,495 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:34,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:34,711 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:34,711 INFO L82 PathProgramCache]: Analyzing trace with hash 799271049, now seen corresponding path program 8 times [2021-03-10 23:27:34,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:34,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329535088] [2021-03-10 23:27:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:34,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329535088] [2021-03-10 23:27:34,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393321019] [2021-03-10 23:27:34,743 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 [2021-03-10 23:27:34,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:34,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:34,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:34,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:34,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450628244] [2021-03-10 23:27:34,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:34,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:34,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:34,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:34,857 INFO L87 Difference]: Start difference. First operand 515 states and 1589 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:35,549 INFO L93 Difference]: Finished difference Result 1842 states and 5297 transitions. [2021-03-10 23:27:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:27:35,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:35,556 INFO L225 Difference]: With dead ends: 1842 [2021-03-10 23:27:35,556 INFO L226 Difference]: Without dead ends: 1842 [2021-03-10 23:27:35,557 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:27:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-03-10 23:27:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 505. [2021-03-10 23:27:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.0734126984126986) internal successors, (1549), 504 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1549 transitions. [2021-03-10 23:27:35,571 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1549 transitions. Word has length 27 [2021-03-10 23:27:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:35,571 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 1549 transitions. [2021-03-10 23:27:35,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1549 transitions. [2021-03-10 23:27:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:35,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:35,573 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:35,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 23:27:35,787 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash 477674582, now seen corresponding path program 1 times [2021-03-10 23:27:35,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:35,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688244964] [2021-03-10 23:27:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:35,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688244964] [2021-03-10 23:27:35,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549021854] [2021-03-10 23:27:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 23:27:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:27:35,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:35,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:35,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:27:35,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805320428] [2021-03-10 23:27:35,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:27:35,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:27:35,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:27:35,886 INFO L87 Difference]: Start difference. First operand 505 states and 1549 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:36,009 INFO L93 Difference]: Finished difference Result 1215 states and 3591 transitions. [2021-03-10 23:27:36,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:27:36,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:36,014 INFO L225 Difference]: With dead ends: 1215 [2021-03-10 23:27:36,014 INFO L226 Difference]: Without dead ends: 1209 [2021-03-10 23:27:36,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-03-10 23:27:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 784. [2021-03-10 23:27:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.177522349936143) internal successors, (2488), 783 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2488 transitions. [2021-03-10 23:27:36,030 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2488 transitions. Word has length 27 [2021-03-10 23:27:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:36,030 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 2488 transitions. [2021-03-10 23:27:36,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2488 transitions. [2021-03-10 23:27:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:36,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:36,032 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:36,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:36,247 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:36,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1397625825, now seen corresponding path program 9 times [2021-03-10 23:27:36,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:36,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723653199] [2021-03-10 23:27:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:36,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723653199] [2021-03-10 23:27:36,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926790758] [2021-03-10 23:27:36,279 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 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 [2021-03-10 23:27:36,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:27:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:36,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:36,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:27:36,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143735515] [2021-03-10 23:27:36,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:36,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:36,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:36,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:36,385 INFO L87 Difference]: Start difference. First operand 784 states and 2488 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:36,556 INFO L93 Difference]: Finished difference Result 1375 states and 4197 transitions. [2021-03-10 23:27:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:27:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:36,562 INFO L225 Difference]: With dead ends: 1375 [2021-03-10 23:27:36,562 INFO L226 Difference]: Without dead ends: 1327 [2021-03-10 23:27:36,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:27:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-03-10 23:27:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 987. [2021-03-10 23:27:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.186612576064909) internal successors, (3142), 986 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3142 transitions. [2021-03-10 23:27:36,580 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3142 transitions. Word has length 27 [2021-03-10 23:27:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:36,580 INFO L480 AbstractCegarLoop]: Abstraction has 987 states and 3142 transitions. [2021-03-10 23:27:36,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3142 transitions. [2021-03-10 23:27:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:36,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:36,582 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:36,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 23:27:36,783 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:36,783 INFO L82 PathProgramCache]: Analyzing trace with hash -485100394, now seen corresponding path program 2 times [2021-03-10 23:27:36,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:36,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341648578] [2021-03-10 23:27:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:36,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341648578] [2021-03-10 23:27:36,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568114378] [2021-03-10 23:27:36,808 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 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 [2021-03-10 23:27:36,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:36,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:36,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:27:36,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:36,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:36,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:27:36,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162548419] [2021-03-10 23:27:36,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:27:36,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:36,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:27:36,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:27:36,886 INFO L87 Difference]: Start difference. First operand 987 states and 3142 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:36,986 INFO L93 Difference]: Finished difference Result 1478 states and 4418 transitions. [2021-03-10 23:27:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:27:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:36,992 INFO L225 Difference]: With dead ends: 1478 [2021-03-10 23:27:36,992 INFO L226 Difference]: Without dead ends: 1478 [2021-03-10 23:27:36,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-03-10 23:27:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2021-03-10 23:27:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.1502487562189057) internal successors, (3166), 1005 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3166 transitions. [2021-03-10 23:27:37,021 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3166 transitions. Word has length 27 [2021-03-10 23:27:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:37,021 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 3166 transitions. [2021-03-10 23:27:37,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3166 transitions. [2021-03-10 23:27:37,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:37,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:37,023 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:37,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 23:27:37,238 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:37,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash -322791177, now seen corresponding path program 10 times [2021-03-10 23:27:37,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:37,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876434094] [2021-03-10 23:27:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:37,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876434094] [2021-03-10 23:27:37,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874562908] [2021-03-10 23:27:37,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:37,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:37,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:37,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:37,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:37,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:37,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:27:37,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950516022] [2021-03-10 23:27:37,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:27:37,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:27:37,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:27:37,371 INFO L87 Difference]: Start difference. First operand 1006 states and 3166 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:37,661 INFO L93 Difference]: Finished difference Result 2277 states and 6674 transitions. [2021-03-10 23:27:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:27:37,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:37,669 INFO L225 Difference]: With dead ends: 2277 [2021-03-10 23:27:37,669 INFO L226 Difference]: Without dead ends: 2277 [2021-03-10 23:27:37,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:27:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-03-10 23:27:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1022. [2021-03-10 23:27:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.147894221351616) internal successors, (3214), 1021 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3214 transitions. [2021-03-10 23:27:37,697 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3214 transitions. Word has length 27 [2021-03-10 23:27:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:37,697 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3214 transitions. [2021-03-10 23:27:37,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3214 transitions. [2021-03-10 23:27:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:37,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:37,699 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:37,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:37,914 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash -410515549, now seen corresponding path program 11 times [2021-03-10 23:27:37,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:37,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844870593] [2021-03-10 23:27:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:37,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844870593] [2021-03-10 23:27:37,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033342806] [2021-03-10 23:27:37,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:37,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:27:37,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:38,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:38,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:27:38,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142996778] [2021-03-10 23:27:38,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:27:38,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:38,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:27:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:27:38,036 INFO L87 Difference]: Start difference. First operand 1022 states and 3214 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:38,454 INFO L93 Difference]: Finished difference Result 2725 states and 7832 transitions. [2021-03-10 23:27:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:27:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:38,463 INFO L225 Difference]: With dead ends: 2725 [2021-03-10 23:27:38,463 INFO L226 Difference]: Without dead ends: 2725 [2021-03-10 23:27:38,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:27:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-03-10 23:27:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1096. [2021-03-10 23:27:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.1406392694063925) internal successors, (3439), 1095 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3439 transitions. [2021-03-10 23:27:38,525 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3439 transitions. Word has length 27 [2021-03-10 23:27:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:38,526 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 3439 transitions. [2021-03-10 23:27:38,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3439 transitions. [2021-03-10 23:27:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:38,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:38,528 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:38,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-03-10 23:27:38,742 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash -737845825, now seen corresponding path program 12 times [2021-03-10 23:27:38,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:38,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356131855] [2021-03-10 23:27:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:38,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356131855] [2021-03-10 23:27:38,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261330464] [2021-03-10 23:27:38,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:38,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 23:27:38,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:38,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:38,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:38,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:27:38,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378899493] [2021-03-10 23:27:38,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:38,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:38,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:38,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:38,880 INFO L87 Difference]: Start difference. First operand 1096 states and 3439 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:39,111 INFO L93 Difference]: Finished difference Result 2457 states and 7416 transitions. [2021-03-10 23:27:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:27:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:39,121 INFO L225 Difference]: With dead ends: 2457 [2021-03-10 23:27:39,121 INFO L226 Difference]: Without dead ends: 2447 [2021-03-10 23:27:39,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:27:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-03-10 23:27:39,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1570. [2021-03-10 23:27:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.1963033779477374) internal successors, (5015), 1569 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5015 transitions. [2021-03-10 23:27:39,154 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5015 transitions. Word has length 27 [2021-03-10 23:27:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:39,154 INFO L480 AbstractCegarLoop]: Abstraction has 1570 states and 5015 transitions. [2021-03-10 23:27:39,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5015 transitions. [2021-03-10 23:27:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:39,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:39,158 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:39,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:39,367 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:39,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:39,367 INFO L82 PathProgramCache]: Analyzing trace with hash 211451865, now seen corresponding path program 13 times [2021-03-10 23:27:39,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:39,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877322708] [2021-03-10 23:27:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:39,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877322708] [2021-03-10 23:27:39,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31226060] [2021-03-10 23:27:39,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:39,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:39,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:39,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:39,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:27:39,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487761461] [2021-03-10 23:27:39,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:39,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:39,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:39,491 INFO L87 Difference]: Start difference. First operand 1570 states and 5015 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:39,751 INFO L93 Difference]: Finished difference Result 2556 states and 7763 transitions. [2021-03-10 23:27:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:27:39,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:39,755 INFO L225 Difference]: With dead ends: 2556 [2021-03-10 23:27:39,756 INFO L226 Difference]: Without dead ends: 2556 [2021-03-10 23:27:39,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:27:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-03-10 23:27:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1576. [2021-03-10 23:27:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.1885714285714286) internal successors, (5022), 1575 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5022 transitions. [2021-03-10 23:27:39,786 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5022 transitions. Word has length 27 [2021-03-10 23:27:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:39,786 INFO L480 AbstractCegarLoop]: Abstraction has 1576 states and 5022 transitions. [2021-03-10 23:27:39,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5022 transitions. [2021-03-10 23:27:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:39,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:39,789 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:40,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:40,007 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1960446489, now seen corresponding path program 14 times [2021-03-10 23:27:40,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:40,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137553273] [2021-03-10 23:27:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:40,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137553273] [2021-03-10 23:27:40,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962675024] [2021-03-10 23:27:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:40,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:40,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:40,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:40,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:40,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:40,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:27:40,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496784918] [2021-03-10 23:27:40,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:27:40,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:40,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:27:40,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:27:40,147 INFO L87 Difference]: Start difference. First operand 1576 states and 5022 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:40,554 INFO L93 Difference]: Finished difference Result 3074 states and 9276 transitions. [2021-03-10 23:27:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:27:40,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:40,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:40,560 INFO L225 Difference]: With dead ends: 3074 [2021-03-10 23:27:40,560 INFO L226 Difference]: Without dead ends: 3070 [2021-03-10 23:27:40,560 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:27:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-03-10 23:27:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1588. [2021-03-10 23:27:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.178323881537492) internal successors, (5044), 1587 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5044 transitions. [2021-03-10 23:27:40,597 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5044 transitions. Word has length 27 [2021-03-10 23:27:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:40,597 INFO L480 AbstractCegarLoop]: Abstraction has 1588 states and 5044 transitions. [2021-03-10 23:27:40,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5044 transitions. [2021-03-10 23:27:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:40,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:40,601 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:40,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:40,816 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash 104759463, now seen corresponding path program 15 times [2021-03-10 23:27:40,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:40,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050584409] [2021-03-10 23:27:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:40,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050584409] [2021-03-10 23:27:40,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334660235] [2021-03-10 23:27:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:40,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:27:40,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:40,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:40,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:40,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:40,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217690519] [2021-03-10 23:27:40,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:40,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:40,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:40,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:40,960 INFO L87 Difference]: Start difference. First operand 1588 states and 5044 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:41,695 INFO L93 Difference]: Finished difference Result 5541 states and 16712 transitions. [2021-03-10 23:27:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:27:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:41,705 INFO L225 Difference]: With dead ends: 5541 [2021-03-10 23:27:41,706 INFO L226 Difference]: Without dead ends: 5541 [2021-03-10 23:27:41,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 391.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:27:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-03-10 23:27:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 1799. [2021-03-10 23:27:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 3.274193548387097) internal successors, (5887), 1798 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5887 transitions. [2021-03-10 23:27:41,758 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5887 transitions. Word has length 27 [2021-03-10 23:27:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:41,758 INFO L480 AbstractCegarLoop]: Abstraction has 1799 states and 5887 transitions. [2021-03-10 23:27:41,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5887 transitions. [2021-03-10 23:27:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:41,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:41,761 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:41,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 23:27:41,975 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash -89141205, now seen corresponding path program 16 times [2021-03-10 23:27:41,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:41,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787420393] [2021-03-10 23:27:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:42,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787420393] [2021-03-10 23:27:42,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300453675] [2021-03-10 23:27:42,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:42,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:42,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:42,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:42,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:42,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:42,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674644926] [2021-03-10 23:27:42,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:42,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:42,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:42,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:42,121 INFO L87 Difference]: Start difference. First operand 1799 states and 5887 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:42,842 INFO L93 Difference]: Finished difference Result 5525 states and 16688 transitions. [2021-03-10 23:27:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:27:42,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:42,852 INFO L225 Difference]: With dead ends: 5525 [2021-03-10 23:27:42,852 INFO L226 Difference]: Without dead ends: 5525 [2021-03-10 23:27:42,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:27:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-03-10 23:27:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 1784. [2021-03-10 23:27:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.259113853056646) internal successors, (5811), 1783 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5811 transitions. [2021-03-10 23:27:42,902 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5811 transitions. Word has length 27 [2021-03-10 23:27:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:42,902 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 5811 transitions. [2021-03-10 23:27:42,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5811 transitions. [2021-03-10 23:27:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:42,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:42,905 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:43,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 23:27:43,121 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash -461050971, now seen corresponding path program 17 times [2021-03-10 23:27:43,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:43,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16746341] [2021-03-10 23:27:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:43,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16746341] [2021-03-10 23:27:43,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489323381] [2021-03-10 23:27:43,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:43,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:27:43,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:43,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:43,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:43,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218998546] [2021-03-10 23:27:43,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:43,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:43,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:43,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:43,284 INFO L87 Difference]: Start difference. First operand 1784 states and 5811 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:43,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:43,976 INFO L93 Difference]: Finished difference Result 5112 states and 15104 transitions. [2021-03-10 23:27:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:27:43,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:43,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:43,986 INFO L225 Difference]: With dead ends: 5112 [2021-03-10 23:27:43,986 INFO L226 Difference]: Without dead ends: 5112 [2021-03-10 23:27:43,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:27:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-03-10 23:27:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 1804. [2021-03-10 23:27:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.265113699389906) internal successors, (5887), 1803 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5887 transitions. [2021-03-10 23:27:44,050 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5887 transitions. Word has length 27 [2021-03-10 23:27:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:44,051 INFO L480 AbstractCegarLoop]: Abstraction has 1804 states and 5887 transitions. [2021-03-10 23:27:44,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5887 transitions. [2021-03-10 23:27:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:44,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:44,055 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:44,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 23:27:44,267 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:44,267 INFO L82 PathProgramCache]: Analyzing trace with hash -650269269, now seen corresponding path program 18 times [2021-03-10 23:27:44,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:44,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852181612] [2021-03-10 23:27:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:44,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852181612] [2021-03-10 23:27:44,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545582181] [2021-03-10 23:27:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:44,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:44,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:44,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:44,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:44,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891165433] [2021-03-10 23:27:44,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:44,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:44,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:44,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:44,392 INFO L87 Difference]: Start difference. First operand 1804 states and 5887 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:45,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:45,006 INFO L93 Difference]: Finished difference Result 4837 states and 14460 transitions. [2021-03-10 23:27:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:27:45,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:45,016 INFO L225 Difference]: With dead ends: 4837 [2021-03-10 23:27:45,016 INFO L226 Difference]: Without dead ends: 4833 [2021-03-10 23:27:45,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:27:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4833 states. [2021-03-10 23:27:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4833 to 1804. [2021-03-10 23:27:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2640044370493624) internal successors, (5885), 1803 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5885 transitions. [2021-03-10 23:27:45,067 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5885 transitions. Word has length 27 [2021-03-10 23:27:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:45,067 INFO L480 AbstractCegarLoop]: Abstraction has 1804 states and 5885 transitions. [2021-03-10 23:27:45,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5885 transitions. [2021-03-10 23:27:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:45,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:45,071 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:45,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 23:27:45,291 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:45,291 INFO L82 PathProgramCache]: Analyzing trace with hash 739251947, now seen corresponding path program 19 times [2021-03-10 23:27:45,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:45,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411975689] [2021-03-10 23:27:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:45,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411975689] [2021-03-10 23:27:45,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380372317] [2021-03-10 23:27:45,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:45,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:45,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:45,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:45,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293643555] [2021-03-10 23:27:45,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:45,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:45,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:45,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:45,457 INFO L87 Difference]: Start difference. First operand 1804 states and 5885 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:46,154 INFO L93 Difference]: Finished difference Result 4879 states and 14554 transitions. [2021-03-10 23:27:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:27:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:46,181 INFO L225 Difference]: With dead ends: 4879 [2021-03-10 23:27:46,181 INFO L226 Difference]: Without dead ends: 4879 [2021-03-10 23:27:46,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:27:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-03-10 23:27:46,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 1814. [2021-03-10 23:27:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2675124103695534) internal successors, (5924), 1813 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5924 transitions. [2021-03-10 23:27:46,222 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5924 transitions. Word has length 27 [2021-03-10 23:27:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:46,222 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5924 transitions. [2021-03-10 23:27:46,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5924 transitions. [2021-03-10 23:27:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:46,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:46,226 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:46,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 23:27:46,439 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:46,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1773065879, now seen corresponding path program 20 times [2021-03-10 23:27:46,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:46,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079694083] [2021-03-10 23:27:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:46,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079694083] [2021-03-10 23:27:46,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371207550] [2021-03-10 23:27:46,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:46,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:46,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:46,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:46,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:46,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:46,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:46,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212575554] [2021-03-10 23:27:46,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:46,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:46,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:46,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:46,565 INFO L87 Difference]: Start difference. First operand 1814 states and 5924 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:47,200 INFO L93 Difference]: Finished difference Result 4586 states and 13852 transitions. [2021-03-10 23:27:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:27:47,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:47,209 INFO L225 Difference]: With dead ends: 4586 [2021-03-10 23:27:47,209 INFO L226 Difference]: Without dead ends: 4582 [2021-03-10 23:27:47,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:27:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-03-10 23:27:47,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 1814. [2021-03-10 23:27:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2664092664092665) internal successors, (5922), 1813 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5922 transitions. [2021-03-10 23:27:47,258 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5922 transitions. Word has length 27 [2021-03-10 23:27:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:47,258 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5922 transitions. [2021-03-10 23:27:47,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5922 transitions. [2021-03-10 23:27:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:47,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:47,262 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:47,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:47,475 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:47,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:47,475 INFO L82 PathProgramCache]: Analyzing trace with hash -393874732, now seen corresponding path program 3 times [2021-03-10 23:27:47,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:47,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523133883] [2021-03-10 23:27:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:47,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523133883] [2021-03-10 23:27:47,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650188209] [2021-03-10 23:27:47,501 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 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 [2021-03-10 23:27:47,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:27:47,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:47,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:27:47,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:47,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:47,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:27:47,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770340952] [2021-03-10 23:27:47,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:27:47,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:47,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:27:47,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:27:47,578 INFO L87 Difference]: Start difference. First operand 1814 states and 5922 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:47,662 INFO L93 Difference]: Finished difference Result 1973 states and 6380 transitions. [2021-03-10 23:27:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:27:47,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:47,665 INFO L225 Difference]: With dead ends: 1973 [2021-03-10 23:27:47,665 INFO L226 Difference]: Without dead ends: 1973 [2021-03-10 23:27:47,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:47,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-03-10 23:27:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1690. [2021-03-10 23:27:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 3.2634695085849614) internal successors, (5512), 1689 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 5512 transitions. [2021-03-10 23:27:47,705 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 5512 transitions. Word has length 27 [2021-03-10 23:27:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:47,705 INFO L480 AbstractCegarLoop]: Abstraction has 1690 states and 5512 transitions. [2021-03-10 23:27:47,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 5512 transitions. [2021-03-10 23:27:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:47,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:47,708 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:47,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:47,923 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:47,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1713019731, now seen corresponding path program 21 times [2021-03-10 23:27:47,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:47,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113993831] [2021-03-10 23:27:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:47,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113993831] [2021-03-10 23:27:47,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841749177] [2021-03-10 23:27:47,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:47,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:27:47,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:47,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:48,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:48,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 23:27:48,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122334463] [2021-03-10 23:27:48,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:27:48,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:48,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:27:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:27:48,049 INFO L87 Difference]: Start difference. First operand 1690 states and 5512 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:48,347 INFO L93 Difference]: Finished difference Result 3078 states and 9480 transitions. [2021-03-10 23:27:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:27:48,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:48,352 INFO L225 Difference]: With dead ends: 3078 [2021-03-10 23:27:48,352 INFO L226 Difference]: Without dead ends: 3078 [2021-03-10 23:27:48,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:27:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-03-10 23:27:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1814. [2021-03-10 23:27:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2465526751241036) internal successors, (5886), 1813 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5886 transitions. [2021-03-10 23:27:48,384 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5886 transitions. Word has length 27 [2021-03-10 23:27:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:48,384 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5886 transitions. [2021-03-10 23:27:48,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5886 transitions. [2021-03-10 23:27:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:48,387 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:48,387 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:48,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:48,603 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:48,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:48,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1929419657, now seen corresponding path program 22 times [2021-03-10 23:27:48,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:48,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162998714] [2021-03-10 23:27:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162998714] [2021-03-10 23:27:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925035061] [2021-03-10 23:27:48,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:48,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:48,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:48,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:48,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:48,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 23:27:48,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942840805] [2021-03-10 23:27:48,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:27:48,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:27:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:27:48,703 INFO L87 Difference]: Start difference. First operand 1814 states and 5886 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:48,960 INFO L93 Difference]: Finished difference Result 3165 states and 9710 transitions. [2021-03-10 23:27:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:27:48,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:48,965 INFO L225 Difference]: With dead ends: 3165 [2021-03-10 23:27:48,965 INFO L226 Difference]: Without dead ends: 3165 [2021-03-10 23:27:48,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:27:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-03-10 23:27:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1928. [2021-03-10 23:27:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2283341982355993) internal successors, (6221), 1927 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6221 transitions. [2021-03-10 23:27:48,995 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6221 transitions. Word has length 27 [2021-03-10 23:27:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:48,995 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 6221 transitions. [2021-03-10 23:27:48,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6221 transitions. [2021-03-10 23:27:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:48,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:48,998 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:49,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 23:27:49,199 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:49,199 INFO L82 PathProgramCache]: Analyzing trace with hash 815616699, now seen corresponding path program 23 times [2021-03-10 23:27:49,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:49,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996241009] [2021-03-10 23:27:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:49,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996241009] [2021-03-10 23:27:49,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064504126] [2021-03-10 23:27:49,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:49,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:27:49,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:49,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:49,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:49,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:49,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 23:27:49,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374836053] [2021-03-10 23:27:49,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:27:49,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:49,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:27:49,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:27:49,305 INFO L87 Difference]: Start difference. First operand 1928 states and 6221 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:49,535 INFO L93 Difference]: Finished difference Result 3029 states and 9362 transitions. [2021-03-10 23:27:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:27:49,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:49,539 INFO L225 Difference]: With dead ends: 3029 [2021-03-10 23:27:49,539 INFO L226 Difference]: Without dead ends: 3025 [2021-03-10 23:27:49,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:27:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-03-10 23:27:49,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 1928. [2021-03-10 23:27:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2272963155163468) internal successors, (6219), 1927 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6219 transitions. [2021-03-10 23:27:49,573 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6219 transitions. Word has length 27 [2021-03-10 23:27:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:49,573 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 6219 transitions. [2021-03-10 23:27:49,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6219 transitions. [2021-03-10 23:27:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:49,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:49,576 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:49,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:49,781 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:49,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1987345865, now seen corresponding path program 24 times [2021-03-10 23:27:49,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:49,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643558385] [2021-03-10 23:27:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:49,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643558385] [2021-03-10 23:27:49,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116395628] [2021-03-10 23:27:49,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:49,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:49,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:49,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:49,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:49,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 23:27:49,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067211021] [2021-03-10 23:27:49,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:27:49,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:27:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:27:49,875 INFO L87 Difference]: Start difference. First operand 1928 states and 6219 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:50,131 INFO L93 Difference]: Finished difference Result 3009 states and 9316 transitions. [2021-03-10 23:27:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:27:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:50,135 INFO L225 Difference]: With dead ends: 3009 [2021-03-10 23:27:50,135 INFO L226 Difference]: Without dead ends: 2993 [2021-03-10 23:27:50,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:27:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-03-10 23:27:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1936. [2021-03-10 23:27:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 3.221188630490956) internal successors, (6233), 1935 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 6233 transitions. [2021-03-10 23:27:50,165 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 6233 transitions. Word has length 27 [2021-03-10 23:27:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:50,165 INFO L480 AbstractCegarLoop]: Abstraction has 1936 states and 6233 transitions. [2021-03-10 23:27:50,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 6233 transitions. [2021-03-10 23:27:50,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:50,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:50,168 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:50,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-10 23:27:50,382 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash 353835191, now seen corresponding path program 25 times [2021-03-10 23:27:50,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:50,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966504430] [2021-03-10 23:27:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:50,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966504430] [2021-03-10 23:27:50,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612308641] [2021-03-10 23:27:50,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:50,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:50,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:50,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:50,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627368771] [2021-03-10 23:27:50,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:50,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:50,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:50,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:50,508 INFO L87 Difference]: Start difference. First operand 1936 states and 6233 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:51,064 INFO L93 Difference]: Finished difference Result 5256 states and 16466 transitions. [2021-03-10 23:27:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:27:51,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:51,075 INFO L225 Difference]: With dead ends: 5256 [2021-03-10 23:27:51,076 INFO L226 Difference]: Without dead ends: 5256 [2021-03-10 23:27:51,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:27:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-03-10 23:27:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 2054. [2021-03-10 23:27:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.297613248904043) internal successors, (6770), 2053 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:51,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6770 transitions. [2021-03-10 23:27:51,121 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6770 transitions. Word has length 27 [2021-03-10 23:27:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:51,122 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 6770 transitions. [2021-03-10 23:27:51,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6770 transitions. [2021-03-10 23:27:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:51,125 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:51,125 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:51,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:51,339 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:51,340 INFO L82 PathProgramCache]: Analyzing trace with hash 159934523, now seen corresponding path program 26 times [2021-03-10 23:27:51,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:51,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229713280] [2021-03-10 23:27:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:51,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229713280] [2021-03-10 23:27:51,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624402160] [2021-03-10 23:27:51,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:51,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:51,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:51,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:51,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:51,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098593152] [2021-03-10 23:27:51,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:51,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:51,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:51,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:51,469 INFO L87 Difference]: Start difference. First operand 2054 states and 6770 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:51,985 INFO L93 Difference]: Finished difference Result 5169 states and 16251 transitions. [2021-03-10 23:27:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:27:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:51,993 INFO L225 Difference]: With dead ends: 5169 [2021-03-10 23:27:51,993 INFO L226 Difference]: Without dead ends: 5169 [2021-03-10 23:27:51,994 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:27:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2021-03-10 23:27:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 2051. [2021-03-10 23:27:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-03-10 23:27:52,034 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-03-10 23:27:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:52,035 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-03-10 23:27:52,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-03-10 23:27:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:52,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:52,038 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:52,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-10 23:27:52,253 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:52,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:52,253 INFO L82 PathProgramCache]: Analyzing trace with hash -211975243, now seen corresponding path program 27 times [2021-03-10 23:27:52,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:52,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110956839] [2021-03-10 23:27:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:52,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110956839] [2021-03-10 23:27:52,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258816185] [2021-03-10 23:27:52,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:52,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:27:52,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:52,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:52,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:52,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:52,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:52,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517070373] [2021-03-10 23:27:52,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:52,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:52,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:52,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:52,379 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:52,847 INFO L93 Difference]: Finished difference Result 4755 states and 14772 transitions. [2021-03-10 23:27:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:27:52,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:52,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:52,854 INFO L225 Difference]: With dead ends: 4755 [2021-03-10 23:27:52,854 INFO L226 Difference]: Without dead ends: 4755 [2021-03-10 23:27:52,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:27:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2021-03-10 23:27:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 2057. [2021-03-10 23:27:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-03-10 23:27:52,898 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-03-10 23:27:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:52,898 INFO L480 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-03-10 23:27:52,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-03-10 23:27:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:52,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:52,901 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:53,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:53,102 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:53,102 INFO L82 PathProgramCache]: Analyzing trace with hash -401193541, now seen corresponding path program 28 times [2021-03-10 23:27:53,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:53,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605194790] [2021-03-10 23:27:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:53,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605194790] [2021-03-10 23:27:53,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402895269] [2021-03-10 23:27:53,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:53,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:53,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:53,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:53,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:53,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072845956] [2021-03-10 23:27:53,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:53,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:53,236 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:53,634 INFO L93 Difference]: Finished difference Result 4606 states and 14402 transitions. [2021-03-10 23:27:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:27:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:53,641 INFO L225 Difference]: With dead ends: 4606 [2021-03-10 23:27:53,641 INFO L226 Difference]: Without dead ends: 4602 [2021-03-10 23:27:53,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:27:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2021-03-10 23:27:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 2051. [2021-03-10 23:27:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-03-10 23:27:53,676 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-03-10 23:27:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:53,676 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-03-10 23:27:53,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-03-10 23:27:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:53,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:53,679 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:53,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 23:27:53,887 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:53,887 INFO L82 PathProgramCache]: Analyzing trace with hash 988327675, now seen corresponding path program 29 times [2021-03-10 23:27:53,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:53,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603827241] [2021-03-10 23:27:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:53,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603827241] [2021-03-10 23:27:53,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179149063] [2021-03-10 23:27:53,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:53,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:27:53,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:53,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:54,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:54,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:54,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217772020] [2021-03-10 23:27:54,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:54,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:54,012 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:54,432 INFO L93 Difference]: Finished difference Result 4605 states and 14373 transitions. [2021-03-10 23:27:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:27:54,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:54,439 INFO L225 Difference]: With dead ends: 4605 [2021-03-10 23:27:54,439 INFO L226 Difference]: Without dead ends: 4605 [2021-03-10 23:27:54,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:27:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-03-10 23:27:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2057. [2021-03-10 23:27:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-03-10 23:27:54,484 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-03-10 23:27:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:54,484 INFO L480 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-03-10 23:27:54,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-03-10 23:27:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:54,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:54,487 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:54,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-03-10 23:27:54,702 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1523990151, now seen corresponding path program 30 times [2021-03-10 23:27:54,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:54,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918473269] [2021-03-10 23:27:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:54,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918473269] [2021-03-10 23:27:54,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487774558] [2021-03-10 23:27:54,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:54,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:54,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:54,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:54,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:54,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969822119] [2021-03-10 23:27:54,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:54,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:54,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:54,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:54,825 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:55,202 INFO L93 Difference]: Finished difference Result 4532 states and 14195 transitions. [2021-03-10 23:27:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:27:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:55,209 INFO L225 Difference]: With dead ends: 4532 [2021-03-10 23:27:55,209 INFO L226 Difference]: Without dead ends: 4528 [2021-03-10 23:27:55,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:27:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-03-10 23:27:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 2051. [2021-03-10 23:27:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-03-10 23:27:55,247 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-03-10 23:27:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:55,247 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-03-10 23:27:55,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-03-10 23:27:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:55,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:55,250 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:55,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:55,463 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash -480721671, now seen corresponding path program 31 times [2021-03-10 23:27:55,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:55,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518813631] [2021-03-10 23:27:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:55,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518813631] [2021-03-10 23:27:55,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446490626] [2021-03-10 23:27:55,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:55,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:55,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:55,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:27:55,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716360405] [2021-03-10 23:27:55,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:27:55,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:55,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:27:55,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:27:55,585 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:55,978 INFO L93 Difference]: Finished difference Result 4168 states and 12771 transitions. [2021-03-10 23:27:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:27:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:55,984 INFO L225 Difference]: With dead ends: 4168 [2021-03-10 23:27:55,984 INFO L226 Difference]: Without dead ends: 4168 [2021-03-10 23:27:55,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:27:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-03-10 23:27:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2247. [2021-03-10 23:27:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.2996438112199464) internal successors, (7411), 2246 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7411 transitions. [2021-03-10 23:27:56,027 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7411 transitions. Word has length 27 [2021-03-10 23:27:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:56,027 INFO L480 AbstractCegarLoop]: Abstraction has 2247 states and 7411 transitions. [2021-03-10 23:27:56,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7411 transitions. [2021-03-10 23:27:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:56,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:56,030 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:56,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-03-10 23:27:56,243 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:56,244 INFO L82 PathProgramCache]: Analyzing trace with hash -669939969, now seen corresponding path program 32 times [2021-03-10 23:27:56,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:56,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381282114] [2021-03-10 23:27:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:56,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381282114] [2021-03-10 23:27:56,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843763329] [2021-03-10 23:27:56,272 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 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 [2021-03-10 23:27:56,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:56,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:56,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:56,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:56,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:27:56,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610934176] [2021-03-10 23:27:56,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:27:56,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:56,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:27:56,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:27:56,362 INFO L87 Difference]: Start difference. First operand 2247 states and 7411 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:56,693 INFO L93 Difference]: Finished difference Result 3963 states and 12253 transitions. [2021-03-10 23:27:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:27:56,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:56,698 INFO L225 Difference]: With dead ends: 3963 [2021-03-10 23:27:56,698 INFO L226 Difference]: Without dead ends: 3959 [2021-03-10 23:27:56,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:27:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-03-10 23:27:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 2247. [2021-03-10 23:27:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.298753339269813) internal successors, (7409), 2246 states have internal predecessors, (7409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7409 transitions. [2021-03-10 23:27:56,733 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7409 transitions. Word has length 27 [2021-03-10 23:27:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:56,733 INFO L480 AbstractCegarLoop]: Abstraction has 2247 states and 7409 transitions. [2021-03-10 23:27:56,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7409 transitions. [2021-03-10 23:27:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:56,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:56,736 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:56,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:56,937 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash -26557709, now seen corresponding path program 33 times [2021-03-10 23:27:56,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:56,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351400935] [2021-03-10 23:27:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:56,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351400935] [2021-03-10 23:27:56,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030577451] [2021-03-10 23:27:56,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:56,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:27:56,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:56,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:56,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:57,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:57,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:27:57,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047861726] [2021-03-10 23:27:57,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:27:57,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:57,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:27:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:27:57,044 INFO L87 Difference]: Start difference. First operand 2247 states and 7409 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:57,316 INFO L93 Difference]: Finished difference Result 3687 states and 11591 transitions. [2021-03-10 23:27:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:27:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:57,321 INFO L225 Difference]: With dead ends: 3687 [2021-03-10 23:27:57,322 INFO L226 Difference]: Without dead ends: 3671 [2021-03-10 23:27:57,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:27:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-03-10 23:27:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2247. [2021-03-10 23:27:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.296081923419412) internal successors, (7403), 2246 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7403 transitions. [2021-03-10 23:27:57,354 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7403 transitions. Word has length 27 [2021-03-10 23:27:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:57,354 INFO L480 AbstractCegarLoop]: Abstraction has 2247 states and 7403 transitions. [2021-03-10 23:27:57,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7403 transitions. [2021-03-10 23:27:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:57,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:57,358 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:57,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-03-10 23:27:57,559 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:57,559 INFO L82 PathProgramCache]: Analyzing trace with hash 285798263, now seen corresponding path program 34 times [2021-03-10 23:27:57,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:57,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804988884] [2021-03-10 23:27:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:57,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804988884] [2021-03-10 23:27:57,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337450694] [2021-03-10 23:27:57,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:57,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:57,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:57,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:57,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:57,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:57,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:57,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411134487] [2021-03-10 23:27:57,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:57,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:57,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:57,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:57,694 INFO L87 Difference]: Start difference. First operand 2247 states and 7403 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:58,039 INFO L93 Difference]: Finished difference Result 3798 states and 11861 transitions. [2021-03-10 23:27:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:27:58,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:58,045 INFO L225 Difference]: With dead ends: 3798 [2021-03-10 23:27:58,045 INFO L226 Difference]: Without dead ends: 3798 [2021-03-10 23:27:58,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:27:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-03-10 23:27:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2417. [2021-03-10 23:27:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.287251655629139) internal successors, (7942), 2416 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7942 transitions. [2021-03-10 23:27:58,082 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7942 transitions. Word has length 27 [2021-03-10 23:27:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:58,083 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7942 transitions. [2021-03-10 23:27:58,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7942 transitions. [2021-03-10 23:27:58,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:58,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:58,086 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:58,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-03-10 23:27:58,296 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2068447733, now seen corresponding path program 35 times [2021-03-10 23:27:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:58,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816287730] [2021-03-10 23:27:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:58,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816287730] [2021-03-10 23:27:58,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406688164] [2021-03-10 23:27:58,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:58,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:27:58,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:58,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:58,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:58,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:58,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:27:58,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213764434] [2021-03-10 23:27:58,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:58,424 INFO L87 Difference]: Start difference. First operand 2417 states and 7942 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:58,782 INFO L93 Difference]: Finished difference Result 3765 states and 11785 transitions. [2021-03-10 23:27:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:27:58,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:58,797 INFO L225 Difference]: With dead ends: 3765 [2021-03-10 23:27:58,797 INFO L226 Difference]: Without dead ends: 3761 [2021-03-10 23:27:58,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:27:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-03-10 23:27:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2417. [2021-03-10 23:27:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2864238410596025) internal successors, (7940), 2416 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7940 transitions. [2021-03-10 23:27:58,837 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7940 transitions. Word has length 27 [2021-03-10 23:27:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:58,837 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7940 transitions. [2021-03-10 23:27:58,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7940 transitions. [2021-03-10 23:27:58,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:27:58,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:58,840 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:59,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:59,041 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476281, now seen corresponding path program 36 times [2021-03-10 23:27:59,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:59,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074630106] [2021-03-10 23:27:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:59,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074630106] [2021-03-10 23:27:59,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980632439] [2021-03-10 23:27:59,074 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 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 [2021-03-10 23:27:59,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:59,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:59,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:59,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:59,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:59,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051321131] [2021-03-10 23:27:59,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:59,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:59,167 INFO L87 Difference]: Start difference. First operand 2417 states and 7940 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:59,387 INFO L93 Difference]: Finished difference Result 3553 states and 11291 transitions. [2021-03-10 23:27:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:27:59,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:27:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:59,393 INFO L225 Difference]: With dead ends: 3553 [2021-03-10 23:27:59,393 INFO L226 Difference]: Without dead ends: 3537 [2021-03-10 23:27:59,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-03-10 23:27:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2417. [2021-03-10 23:27:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2839403973509933) internal successors, (7934), 2416 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7934 transitions. [2021-03-10 23:27:59,432 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7934 transitions. Word has length 27 [2021-03-10 23:27:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:59,432 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7934 transitions. [2021-03-10 23:27:59,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7934 transitions. [2021-03-10 23:27:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:27:59,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:59,436 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:59,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 23:27:59,651 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:59,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2108890711, now seen corresponding path program 4 times [2021-03-10 23:27:59,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:59,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872040968] [2021-03-10 23:27:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:00,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872040968] [2021-03-10 23:28:00,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345124144] [2021-03-10 23:28:00,008 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 [2021-03-10 23:28:00,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:28:00,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:28:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:00,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:00,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:00,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 23:28:00,270 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:00,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:00,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:00,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:00,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:28:00,283 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:00,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:00,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:00,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:28:00,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:00,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:00,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:00,314 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-03-10 23:28:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:00,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:00,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:28:00,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948375813] [2021-03-10 23:28:00,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:28:00,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:00,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:28:00,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:28:00,338 INFO L87 Difference]: Start difference. First operand 2417 states and 7934 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) [2021-03-10 23:28:02,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:02,331 INFO L93 Difference]: Finished difference Result 3657 states and 11686 transitions. [2021-03-10 23:28:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:28:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:02,337 INFO L225 Difference]: With dead ends: 3657 [2021-03-10 23:28:02,337 INFO L226 Difference]: Without dead ends: 3638 [2021-03-10 23:28:02,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1550.2ms TimeCoverageRelationStatistics Valid=291, Invalid=2061, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:28:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-03-10 23:28:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2534. [2021-03-10 23:28:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 3.2822739834188708) internal successors, (8314), 2533 states have internal predecessors, (8314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 8314 transitions. [2021-03-10 23:28:02,375 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 8314 transitions. Word has length 30 [2021-03-10 23:28:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:02,375 INFO L480 AbstractCegarLoop]: Abstraction has 2534 states and 8314 transitions. [2021-03-10 23:28:02,375 INFO L481 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) [2021-03-10 23:28:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 8314 transitions. [2021-03-10 23:28:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:02,379 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:02,379 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:02,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:02,580 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:02,580 INFO L82 PathProgramCache]: Analyzing trace with hash 718703517, now seen corresponding path program 5 times [2021-03-10 23:28:02,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:02,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855415719] [2021-03-10 23:28:02,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855415719] [2021-03-10 23:28:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356000136] [2021-03-10 23:28:02,910 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 [2021-03-10 23:28:02,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:28:02,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:02,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:28:02,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:03,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:03,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:03,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 23:28:03,208 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:03,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:03,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:03,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:28:03,220 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:03,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:03,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:03,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:28:03,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:03,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:03,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:03,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-03-10 23:28:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:03,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:03,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 23:28:03,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709067028] [2021-03-10 23:28:03,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:28:03,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:03,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:28:03,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:28:03,291 INFO L87 Difference]: Start difference. First operand 2534 states and 8314 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:04,716 INFO L93 Difference]: Finished difference Result 3341 states and 10732 transitions. [2021-03-10 23:28:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:28:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:04,721 INFO L225 Difference]: With dead ends: 3341 [2021-03-10 23:28:04,721 INFO L226 Difference]: Without dead ends: 3326 [2021-03-10 23:28:04,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1332.8ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:28:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-03-10 23:28:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2554. [2021-03-10 23:28:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 3.2773207990599293) internal successors, (8367), 2553 states have internal predecessors, (8367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 8367 transitions. [2021-03-10 23:28:04,765 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 8367 transitions. Word has length 30 [2021-03-10 23:28:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:04,765 INFO L480 AbstractCegarLoop]: Abstraction has 2554 states and 8367 transitions. [2021-03-10 23:28:04,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:04,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 8367 transitions. [2021-03-10 23:28:04,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:04,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:04,769 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:04,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 23:28:04,970 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1188939468, now seen corresponding path program 37 times [2021-03-10 23:28:04,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:04,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347553391] [2021-03-10 23:28:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:05,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347553391] [2021-03-10 23:28:05,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217545655] [2021-03-10 23:28:05,407 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 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 [2021-03-10 23:28:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:28:05,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:05,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:05,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:05,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:05,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:28:05,630 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:05,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:05,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:05,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:05,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:28:05,644 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:05,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:05,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:05,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:28:05,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:05,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:05,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:05,670 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:28:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:05,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:05,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-03-10 23:28:05,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921928542] [2021-03-10 23:28:05,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:28:05,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:05,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:28:05,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:28:05,691 INFO L87 Difference]: Start difference. First operand 2554 states and 8367 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:09,440 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-03-10 23:28:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:10,015 INFO L93 Difference]: Finished difference Result 3687 states and 11674 transitions. [2021-03-10 23:28:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-10 23:28:10,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:10,021 INFO L225 Difference]: With dead ends: 3687 [2021-03-10 23:28:10,021 INFO L226 Difference]: Without dead ends: 3661 [2021-03-10 23:28:10,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 3767.9ms TimeCoverageRelationStatistics Valid=780, Invalid=5072, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 23:28:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-03-10 23:28:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2621. [2021-03-10 23:28:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 3.2645038167938933) internal successors, (8553), 2620 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 8553 transitions. [2021-03-10 23:28:10,059 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 8553 transitions. Word has length 30 [2021-03-10 23:28:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:10,059 INFO L480 AbstractCegarLoop]: Abstraction has 2621 states and 8553 transitions. [2021-03-10 23:28:10,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 8553 transitions. [2021-03-10 23:28:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:10,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:10,063 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:10,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:10,272 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:10,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1000041265, now seen corresponding path program 6 times [2021-03-10 23:28:10,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:10,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450377096] [2021-03-10 23:28:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:10,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450377096] [2021-03-10 23:28:10,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634237357] [2021-03-10 23:28:10,591 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 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 [2021-03-10 23:28:10,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:28:10,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:10,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:28:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:10,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:10,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:10,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-03-10 23:28:10,793 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:10,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:10,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:10,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-03-10 23:28:10,839 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:10,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:10,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:10,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:28:10,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:28:10,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:10,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:10,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-03-10 23:28:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:11,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:11,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:28:11,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218370948] [2021-03-10 23:28:11,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:28:11,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:28:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:28:11,045 INFO L87 Difference]: Start difference. First operand 2621 states and 8553 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:13,974 INFO L93 Difference]: Finished difference Result 4308 states and 13572 transitions. [2021-03-10 23:28:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:28:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:13,981 INFO L225 Difference]: With dead ends: 4308 [2021-03-10 23:28:13,981 INFO L226 Difference]: Without dead ends: 4283 [2021-03-10 23:28:13,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2244.9ms TimeCoverageRelationStatistics Valid=481, Invalid=3425, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:28:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2021-03-10 23:28:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 2685. [2021-03-10 23:28:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 3.2775707898658717) internal successors, (8797), 2684 states have internal predecessors, (8797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 8797 transitions. [2021-03-10 23:28:14,041 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 8797 transitions. Word has length 30 [2021-03-10 23:28:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:14,042 INFO L480 AbstractCegarLoop]: Abstraction has 2685 states and 8797 transitions. [2021-03-10 23:28:14,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 8797 transitions. [2021-03-10 23:28:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:14,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:14,045 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:14,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:14,260 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash 981677892, now seen corresponding path program 38 times [2021-03-10 23:28:14,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:14,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864703145] [2021-03-10 23:28:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:14,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864703145] [2021-03-10 23:28:14,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418305438] [2021-03-10 23:28:14,772 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 [2021-03-10 23:28:14,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:28:14,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:28:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:15,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:15,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:15,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:15,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:15,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:28:15,047 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:15,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:15,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:15,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:15,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:15,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:15,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:28:15,060 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:15,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:15,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:15,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:28:15,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:15,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:15,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:15,085 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:28:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:15,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:15,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:28:15,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201512691] [2021-03-10 23:28:15,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:28:15,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:28:15,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:28:15,106 INFO L87 Difference]: Start difference. First operand 2685 states and 8797 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:15,535 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-03-10 23:28:16,225 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-10 23:28:16,669 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-03-10 23:28:17,078 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-03-10 23:28:17,406 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-03-10 23:28:18,027 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-10 23:28:18,156 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-03-10 23:28:18,928 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-03-10 23:28:19,224 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-03-10 23:28:19,375 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-03-10 23:28:20,237 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-03-10 23:28:20,996 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-03-10 23:28:21,388 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-03-10 23:28:22,128 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-03-10 23:28:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:23,064 INFO L93 Difference]: Finished difference Result 4369 states and 13749 transitions. [2021-03-10 23:28:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 23:28:23,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:23,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:23,072 INFO L225 Difference]: With dead ends: 4369 [2021-03-10 23:28:23,072 INFO L226 Difference]: Without dead ends: 4347 [2021-03-10 23:28:23,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3179 ImplicationChecksByTransitivity, 7164.4ms TimeCoverageRelationStatistics Valid=1294, Invalid=8408, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 23:28:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2021-03-10 23:28:23,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 2712. [2021-03-10 23:28:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 3.2788638878642566) internal successors, (8889), 2711 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 8889 transitions. [2021-03-10 23:28:23,117 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 8889 transitions. Word has length 30 [2021-03-10 23:28:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:23,117 INFO L480 AbstractCegarLoop]: Abstraction has 2712 states and 8889 transitions. [2021-03-10 23:28:23,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 8889 transitions. [2021-03-10 23:28:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:23,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:23,121 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:23,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-03-10 23:28:23,335 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:23,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1470198580, now seen corresponding path program 39 times [2021-03-10 23:28:23,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:23,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338317119] [2021-03-10 23:28:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:23,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338317119] [2021-03-10 23:28:23,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128505730] [2021-03-10 23:28:23,746 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 [2021-03-10 23:28:23,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:28:23,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:23,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:28:23,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:24,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:24,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:24,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:24,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:24,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:28:24,012 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:24,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:24,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:24,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:24,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:24,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:28:24,026 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:24,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:24,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:24,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:28:24,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:24,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:24,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:24,051 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:28:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:24,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:24,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-03-10 23:28:24,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950146219] [2021-03-10 23:28:24,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:28:24,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:24,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:28:24,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:28:24,078 INFO L87 Difference]: Start difference. First operand 2712 states and 8889 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:26,202 INFO L93 Difference]: Finished difference Result 4667 states and 14543 transitions. [2021-03-10 23:28:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:28:26,202 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:26,209 INFO L225 Difference]: With dead ends: 4667 [2021-03-10 23:28:26,209 INFO L226 Difference]: Without dead ends: 4637 [2021-03-10 23:28:26,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1808.8ms TimeCoverageRelationStatistics Valid=380, Invalid=2926, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:28:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2021-03-10 23:28:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 2853. [2021-03-10 23:28:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 3.266830294530154) internal successors, (9317), 2852 states have internal predecessors, (9317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 9317 transitions. [2021-03-10 23:28:26,253 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 9317 transitions. Word has length 30 [2021-03-10 23:28:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:26,253 INFO L480 AbstractCegarLoop]: Abstraction has 2853 states and 9317 transitions. [2021-03-10 23:28:26,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 9317 transitions. [2021-03-10 23:28:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:26,256 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:26,256 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:26,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:26,457 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:26,457 INFO L82 PathProgramCache]: Analyzing trace with hash -244071459, now seen corresponding path program 7 times [2021-03-10 23:28:26,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:26,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75686145] [2021-03-10 23:28:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:26,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75686145] [2021-03-10 23:28:26,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742642910] [2021-03-10 23:28:26,776 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 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 [2021-03-10 23:28:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:26,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:28:26,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:26,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:26,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:26,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:26,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-03-10 23:28:26,982 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:26,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:26,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:26,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:27,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-03-10 23:28:27,024 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:27,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:27,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:27,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 49 [2021-03-10 23:28:27,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:28:27,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:27,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:27,143 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-03-10 23:28:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:27,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:27,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:28:27,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143740343] [2021-03-10 23:28:27,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:28:27,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:27,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:28:27,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:28:27,207 INFO L87 Difference]: Start difference. First operand 2853 states and 9317 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:29,303 INFO L93 Difference]: Finished difference Result 4075 states and 13084 transitions. [2021-03-10 23:28:29,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:28:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:29,310 INFO L225 Difference]: With dead ends: 4075 [2021-03-10 23:28:29,310 INFO L226 Difference]: Without dead ends: 4050 [2021-03-10 23:28:29,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1695.6ms TimeCoverageRelationStatistics Valid=362, Invalid=2394, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:28:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2021-03-10 23:28:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 2845. [2021-03-10 23:28:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 3.268635724331927) internal successors, (9296), 2844 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 9296 transitions. [2021-03-10 23:28:29,356 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 9296 transitions. Word has length 30 [2021-03-10 23:28:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:29,356 INFO L480 AbstractCegarLoop]: Abstraction has 2845 states and 9296 transitions. [2021-03-10 23:28:29,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 9296 transitions. [2021-03-10 23:28:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:29,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:29,359 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:29,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 23:28:29,560 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 625926769, now seen corresponding path program 8 times [2021-03-10 23:28:29,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:29,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474874231] [2021-03-10 23:28:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:29,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474874231] [2021-03-10 23:28:29,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406478025] [2021-03-10 23:28:29,940 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:28:29,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:28:29,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:29,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:28:29,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:30,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:30,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:30,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 23:28:30,232 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:30,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:30,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:30,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:30,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:28:30,246 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:30,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:30,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:30,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:28:30,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:30,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:30,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:30,272 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-03-10 23:28:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:30,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:30,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:28:30,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381989490] [2021-03-10 23:28:30,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:28:30,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:30,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:28:30,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:28:30,296 INFO L87 Difference]: Start difference. First operand 2845 states and 9296 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:30,728 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 23:28:31,118 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-03-10 23:28:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:32,156 INFO L93 Difference]: Finished difference Result 3583 states and 11510 transitions. [2021-03-10 23:28:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:28:32,157 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:32,162 INFO L225 Difference]: With dead ends: 3583 [2021-03-10 23:28:32,162 INFO L226 Difference]: Without dead ends: 3568 [2021-03-10 23:28:32,163 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1743.3ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:28:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2021-03-10 23:28:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 2848. [2021-03-10 23:28:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 3.269406392694064) internal successors, (9308), 2847 states have internal predecessors, (9308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 9308 transitions. [2021-03-10 23:28:32,200 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 9308 transitions. Word has length 30 [2021-03-10 23:28:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:32,200 INFO L480 AbstractCegarLoop]: Abstraction has 2848 states and 9308 transitions. [2021-03-10 23:28:32,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 9308 transitions. [2021-03-10 23:28:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:32,203 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:32,203 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:32,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:32,404 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash -947131235, now seen corresponding path program 9 times [2021-03-10 23:28:32,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:32,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593342111] [2021-03-10 23:28:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:32,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593342111] [2021-03-10 23:28:32,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235461119] [2021-03-10 23:28:32,665 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 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 [2021-03-10 23:28:32,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:28:32,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:28:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:32,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:32,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 23:28:32,939 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:32,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:32,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:32,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:32,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:28:32,951 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:32,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:32,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:32,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:28:32,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:32,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:32,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:32,975 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-03-10 23:28:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:32,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:32,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-03-10 23:28:32,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398948378] [2021-03-10 23:28:32,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:28:32,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:32,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:28:32,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:28:32,997 INFO L87 Difference]: Start difference. First operand 2848 states and 9308 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:34,243 INFO L93 Difference]: Finished difference Result 3871 states and 12414 transitions. [2021-03-10 23:28:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:28:34,244 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:34,250 INFO L225 Difference]: With dead ends: 3871 [2021-03-10 23:28:34,250 INFO L226 Difference]: Without dead ends: 3856 [2021-03-10 23:28:34,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1114.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:28:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2021-03-10 23:28:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 2851. [2021-03-10 23:28:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 3.2712280701754386) internal successors, (9323), 2850 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-03-10 23:28:34,298 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-03-10 23:28:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:34,298 INFO L480 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-03-10 23:28:34,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-03-10 23:28:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:34,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:34,302 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:34,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:34,502 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:34,503 INFO L82 PathProgramCache]: Analyzing trace with hash 542604875, now seen corresponding path program 10 times [2021-03-10 23:28:34,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:34,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569142869] [2021-03-10 23:28:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:34,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569142869] [2021-03-10 23:28:34,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470992947] [2021-03-10 23:28:34,767 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 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 [2021-03-10 23:28:34,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:28:34,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:28:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:34,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:34,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:34,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-03-10 23:28:34,996 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:35,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:35,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:35,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:35,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:35,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-03-10 23:28:35,053 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:35,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:35,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:28:35,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:28:35,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:35,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:35,159 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-03-10 23:28:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:35,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:35,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:28:35,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948229589] [2021-03-10 23:28:35,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:28:35,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:28:35,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:28:35,219 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:37,540 INFO L93 Difference]: Finished difference Result 4748 states and 15084 transitions. [2021-03-10 23:28:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:28:37,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:37,548 INFO L225 Difference]: With dead ends: 4748 [2021-03-10 23:28:37,548 INFO L226 Difference]: Without dead ends: 4708 [2021-03-10 23:28:37,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1775.7ms TimeCoverageRelationStatistics Valid=453, Invalid=2739, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:28:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2021-03-10 23:28:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 2843. [2021-03-10 23:28:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2843 states, 2842 states have (on average 3.2688247712878256) internal successors, (9290), 2842 states have internal predecessors, (9290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2843 states to 2843 states and 9290 transitions. [2021-03-10 23:28:37,599 INFO L78 Accepts]: Start accepts. Automaton has 2843 states and 9290 transitions. Word has length 30 [2021-03-10 23:28:37,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:37,599 INFO L480 AbstractCegarLoop]: Abstraction has 2843 states and 9290 transitions. [2021-03-10 23:28:37,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2843 states and 9290 transitions. [2021-03-10 23:28:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:37,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:37,603 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:37,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:37,818 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:37,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2080396478, now seen corresponding path program 40 times [2021-03-10 23:28:37,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:37,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455518551] [2021-03-10 23:28:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:38,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455518551] [2021-03-10 23:28:38,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020109103] [2021-03-10 23:28:38,234 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 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 [2021-03-10 23:28:38,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:28:38,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:28:38,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:38,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:38,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:38,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:28:38,540 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:38,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:38,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:38,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:38,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:28:38,555 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:38,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:38,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:38,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:28:38,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:38,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:38,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:38,584 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:28:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:38,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:38,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-03-10 23:28:38,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801844401] [2021-03-10 23:28:38,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:28:38,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:38,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:28:38,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:28:38,610 INFO L87 Difference]: Start difference. First operand 2843 states and 9290 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:40,297 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-03-10 23:28:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:41,967 INFO L93 Difference]: Finished difference Result 5422 states and 16813 transitions. [2021-03-10 23:28:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:28:41,967 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:41,975 INFO L225 Difference]: With dead ends: 5422 [2021-03-10 23:28:41,975 INFO L226 Difference]: Without dead ends: 5392 [2021-03-10 23:28:41,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2912.1ms TimeCoverageRelationStatistics Valid=667, Invalid=3889, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 23:28:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2021-03-10 23:28:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 2915. [2021-03-10 23:28:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2915 states, 2914 states have (on average 3.287920384351407) internal successors, (9581), 2914 states have internal predecessors, (9581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2915 states to 2915 states and 9581 transitions. [2021-03-10 23:28:42,026 INFO L78 Accepts]: Start accepts. Automaton has 2915 states and 9581 transitions. Word has length 30 [2021-03-10 23:28:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:42,026 INFO L480 AbstractCegarLoop]: Abstraction has 2915 states and 9581 transitions. [2021-03-10 23:28:42,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2915 states and 9581 transitions. [2021-03-10 23:28:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:42,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:42,029 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:42,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:42,230 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:42,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1931199092, now seen corresponding path program 41 times [2021-03-10 23:28:42,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:42,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822166195] [2021-03-10 23:28:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:42,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822166195] [2021-03-10 23:28:42,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278855925] [2021-03-10 23:28:42,599 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 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 [2021-03-10 23:28:42,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:28:42,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:42,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:28:42,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:42,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:42,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:28:42,855 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:42,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:42,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:28:42,868 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:42,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:42,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:42,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:28:42,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:42,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:42,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:42,894 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:28:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:42,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:42,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-03-10 23:28:42,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413485898] [2021-03-10 23:28:42,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:28:42,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:42,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:28:42,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:28:42,919 INFO L87 Difference]: Start difference. First operand 2915 states and 9581 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:44,740 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-03-10 23:28:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:46,018 INFO L93 Difference]: Finished difference Result 5097 states and 16090 transitions. [2021-03-10 23:28:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:28:46,018 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:46,027 INFO L225 Difference]: With dead ends: 5097 [2021-03-10 23:28:46,027 INFO L226 Difference]: Without dead ends: 5067 [2021-03-10 23:28:46,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2692.8ms TimeCoverageRelationStatistics Valid=644, Invalid=3516, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:28:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-03-10 23:28:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 2919. [2021-03-10 23:28:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2919 states, 2918 states have (on average 3.2888965044551064) internal successors, (9597), 2918 states have internal predecessors, (9597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2919 states to 2919 states and 9597 transitions. [2021-03-10 23:28:46,080 INFO L78 Accepts]: Start accepts. Automaton has 2919 states and 9597 transitions. Word has length 30 [2021-03-10 23:28:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:46,081 INFO L480 AbstractCegarLoop]: Abstraction has 2919 states and 9597 transitions. [2021-03-10 23:28:46,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2919 states and 9597 transitions. [2021-03-10 23:28:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:46,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:46,085 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:46,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-03-10 23:28:46,285 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:46,286 INFO L82 PathProgramCache]: Analyzing trace with hash -590660368, now seen corresponding path program 42 times [2021-03-10 23:28:46,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:46,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898021164] [2021-03-10 23:28:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:46,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898021164] [2021-03-10 23:28:46,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062605995] [2021-03-10 23:28:46,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:28:46,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:28:46,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:46,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:28:46,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:46,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:46,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-03-10 23:28:47,098 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:47,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:47,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:47,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:47,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:47,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-03-10 23:28:47,334 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:47,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:47,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:47,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-03-10 23:28:47,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:28:48,156 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2021-03-10 23:28:48,157 INFO L628 ElimStorePlain]: treesize reduction 228, result has 89.5 percent of original size [2021-03-10 23:28:48,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:48,456 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:58 [2021-03-10 23:28:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:48,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:48,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-03-10 23:28:48,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132492630] [2021-03-10 23:28:48,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:28:48,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:28:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:28:48,532 INFO L87 Difference]: Start difference. First operand 2919 states and 9597 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:48,683 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-03-10 23:28:48,998 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-03-10 23:28:50,845 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-03-10 23:28:51,863 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-03-10 23:28:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:53,570 INFO L93 Difference]: Finished difference Result 5916 states and 18505 transitions. [2021-03-10 23:28:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 23:28:53,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:53,579 INFO L225 Difference]: With dead ends: 5916 [2021-03-10 23:28:53,579 INFO L226 Difference]: Without dead ends: 5890 [2021-03-10 23:28:53,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 4295.6ms TimeCoverageRelationStatistics Valid=1066, Invalid=5906, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:28:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2021-03-10 23:28:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 2928. [2021-03-10 23:28:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 3.2924496071062523) internal successors, (9637), 2927 states have internal predecessors, (9637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 9637 transitions. [2021-03-10 23:28:53,632 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 9637 transitions. Word has length 30 [2021-03-10 23:28:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:53,632 INFO L480 AbstractCegarLoop]: Abstraction has 2928 states and 9637 transitions. [2021-03-10 23:28:53,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 9637 transitions. [2021-03-10 23:28:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:53,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:53,636 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:53,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:53,844 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1821640756, now seen corresponding path program 43 times [2021-03-10 23:28:53,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:53,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304012200] [2021-03-10 23:28:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:54,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304012200] [2021-03-10 23:28:54,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113811157] [2021-03-10 23:28:54,376 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 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 [2021-03-10 23:28:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:28:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:54,719 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-03-10 23:28:54,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 175 [2021-03-10 23:28:54,723 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:54,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:54,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:54,752 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-03-10 23:28:54,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 98 [2021-03-10 23:28:54,755 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:28:54,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:54,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:54,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 26 [2021-03-10 23:28:54,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:54,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:54,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:54,786 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:212, output treesize:3 [2021-03-10 23:28:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:54,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:54,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:28:54,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856895867] [2021-03-10 23:28:54,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:28:54,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:54,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:28:54,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:28:54,811 INFO L87 Difference]: Start difference. First operand 2928 states and 9637 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:55,317 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-03-10 23:28:55,809 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-10 23:28:55,956 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-03-10 23:28:56,213 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-10 23:28:56,769 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-03-10 23:28:57,295 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-03-10 23:28:57,727 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-03-10 23:28:58,554 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-10 23:28:58,724 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-03-10 23:28:59,209 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-03-10 23:28:59,737 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-03-10 23:29:00,110 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-03-10 23:29:00,305 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-03-10 23:29:00,743 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 23:29:00,882 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-03-10 23:29:01,422 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-03-10 23:29:01,770 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-10 23:29:01,962 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-03-10 23:29:02,203 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-03-10 23:29:02,415 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-03-10 23:29:02,823 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-03-10 23:29:03,032 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-03-10 23:29:03,715 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-03-10 23:29:03,859 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-03-10 23:29:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:04,450 INFO L93 Difference]: Finished difference Result 4172 states and 13220 transitions. [2021-03-10 23:29:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-03-10 23:29:04,451 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:04,457 INFO L225 Difference]: With dead ends: 4172 [2021-03-10 23:29:04,457 INFO L226 Difference]: Without dead ends: 4146 [2021-03-10 23:29:04,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 8366.3ms TimeCoverageRelationStatistics Valid=1045, Invalid=7327, Unknown=0, NotChecked=0, Total=8372 [2021-03-10 23:29:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2021-03-10 23:29:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 2922. [2021-03-10 23:29:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.2920232796987334) internal successors, (9616), 2921 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 9616 transitions. [2021-03-10 23:29:04,501 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 9616 transitions. Word has length 30 [2021-03-10 23:29:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:04,502 INFO L480 AbstractCegarLoop]: Abstraction has 2922 states and 9616 transitions. [2021-03-10 23:29:04,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 9616 transitions. [2021-03-10 23:29:04,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:04,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:04,505 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:04,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-03-10 23:29:04,719 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:04,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1396792529, now seen corresponding path program 11 times [2021-03-10 23:29:04,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:04,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307122286] [2021-03-10 23:29:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:05,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307122286] [2021-03-10 23:29:05,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998291117] [2021-03-10 23:29:05,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:29:05,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:29:05,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:05,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:29:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:05,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:05,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:05,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:05,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-03-10 23:29:05,345 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:05,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:05,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:05,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:05,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:05,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-03-10 23:29:05,392 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:05,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:05,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:05,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 49 [2021-03-10 23:29:05,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:29:05,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:05,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:05,490 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-03-10 23:29:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:05,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:05,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:29:05,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551299439] [2021-03-10 23:29:05,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:29:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:29:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:29:05,580 INFO L87 Difference]: Start difference. First operand 2922 states and 9616 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:07,774 INFO L93 Difference]: Finished difference Result 4036 states and 13072 transitions. [2021-03-10 23:29:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:29:07,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:07,780 INFO L225 Difference]: With dead ends: 4036 [2021-03-10 23:29:07,780 INFO L226 Difference]: Without dead ends: 4011 [2021-03-10 23:29:07,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1733.1ms TimeCoverageRelationStatistics Valid=294, Invalid=2256, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:29:07,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4011 states. [2021-03-10 23:29:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4011 to 2911. [2021-03-10 23:29:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 3.293127147766323) internal successors, (9583), 2910 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 9583 transitions. [2021-03-10 23:29:07,821 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 9583 transitions. Word has length 30 [2021-03-10 23:29:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:07,821 INFO L480 AbstractCegarLoop]: Abstraction has 2911 states and 9583 transitions. [2021-03-10 23:29:07,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 9583 transitions. [2021-03-10 23:29:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:07,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:07,825 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:08,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:08,025 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:08,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1024051753, now seen corresponding path program 12 times [2021-03-10 23:29:08,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:08,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122705825] [2021-03-10 23:29:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:08,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122705825] [2021-03-10 23:29:08,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437277474] [2021-03-10 23:29:08,398 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:29:08,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:29:08,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:08,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:29:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:08,793 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 23:29:08,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 179 treesize of output 159 [2021-03-10 23:29:08,796 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:08,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:08,825 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 23:29:08,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 96 [2021-03-10 23:29:08,828 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:08,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:08,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:08,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-10 23:29:08,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:08,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:08,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:08,862 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:187, output treesize:3 [2021-03-10 23:29:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:08,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:08,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:29:08,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700338034] [2021-03-10 23:29:08,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:29:08,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:29:08,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:29:08,883 INFO L87 Difference]: Start difference. First operand 2911 states and 9583 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) [2021-03-10 23:29:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:27,768 INFO L93 Difference]: Finished difference Result 3854 states and 12444 transitions. [2021-03-10 23:29:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:29:27,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:27,774 INFO L225 Difference]: With dead ends: 3854 [2021-03-10 23:29:27,774 INFO L226 Difference]: Without dead ends: 3835 [2021-03-10 23:29:27,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1817.4ms TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:29:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-03-10 23:29:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 2970. [2021-03-10 23:29:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 3.293027955540586) internal successors, (9777), 2969 states have internal predecessors, (9777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 9777 transitions. [2021-03-10 23:29:27,817 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 9777 transitions. Word has length 30 [2021-03-10 23:29:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:27,817 INFO L480 AbstractCegarLoop]: Abstraction has 2970 states and 9777 transitions. [2021-03-10 23:29:27,817 INFO L481 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) [2021-03-10 23:29:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 9777 transitions. [2021-03-10 23:29:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:27,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:27,822 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:28,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:28,033 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:28,033 INFO L82 PathProgramCache]: Analyzing trace with hash -443321315, now seen corresponding path program 13 times [2021-03-10 23:29:28,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:28,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242390524] [2021-03-10 23:29:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:28,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242390524] [2021-03-10 23:29:28,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746037210] [2021-03-10 23:29:28,415 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 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 [2021-03-10 23:29:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:28,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:29:28,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:28,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:28,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:28,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:28,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-03-10 23:29:28,671 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:28,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:28,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:28,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-03-10 23:29:28,735 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:28,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:28,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:28,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 49 [2021-03-10 23:29:28,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:29:28,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:28,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:28,840 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-03-10 23:29:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:28,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:28,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:29:28,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918826270] [2021-03-10 23:29:28,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:29:28,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:28,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:29:28,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:29:28,913 INFO L87 Difference]: Start difference. First operand 2970 states and 9777 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:30,914 INFO L93 Difference]: Finished difference Result 4155 states and 13471 transitions. [2021-03-10 23:29:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:29:30,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:30,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:30,922 INFO L225 Difference]: With dead ends: 4155 [2021-03-10 23:29:30,922 INFO L226 Difference]: Without dead ends: 4130 [2021-03-10 23:29:30,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1641.5ms TimeCoverageRelationStatistics Valid=290, Invalid=2062, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:29:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4130 states. [2021-03-10 23:29:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4130 to 2962. [2021-03-10 23:29:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 3.2948328267477205) internal successors, (9756), 2961 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 9756 transitions. [2021-03-10 23:29:30,972 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 9756 transitions. Word has length 30 [2021-03-10 23:29:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:30,972 INFO L480 AbstractCegarLoop]: Abstraction has 2962 states and 9756 transitions. [2021-03-10 23:29:30,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 9756 transitions. [2021-03-10 23:29:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:30,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:30,977 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:31,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-03-10 23:29:31,191 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash 426676913, now seen corresponding path program 14 times [2021-03-10 23:29:31,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:31,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847573397] [2021-03-10 23:29:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:31,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847573397] [2021-03-10 23:29:31,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716515636] [2021-03-10 23:29:31,603 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 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 [2021-03-10 23:29:31,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:29:31,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:31,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:29:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:31,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:31,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:31,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 23:29:31,924 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:31,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:31,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:31,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:31,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:29:31,937 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:31,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:31,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:29:31,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:31,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:31,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:31,966 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-03-10 23:29:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:31,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:31,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:29:31,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066183401] [2021-03-10 23:29:31,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:29:31,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:29:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:29:31,992 INFO L87 Difference]: Start difference. First operand 2962 states and 9756 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:33,588 INFO L93 Difference]: Finished difference Result 3671 states and 11885 transitions. [2021-03-10 23:29:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:29:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:33,594 INFO L225 Difference]: With dead ends: 3671 [2021-03-10 23:29:33,595 INFO L226 Difference]: Without dead ends: 3656 [2021-03-10 23:29:33,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1467.1ms TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:29:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-03-10 23:29:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 2965. [2021-03-10 23:29:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 3.2955465587044532) internal successors, (9768), 2964 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 9768 transitions. [2021-03-10 23:29:33,637 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 9768 transitions. Word has length 30 [2021-03-10 23:29:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:33,637 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 9768 transitions. [2021-03-10 23:29:33,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 9768 transitions. [2021-03-10 23:29:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:33,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:33,641 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:33,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:33,855 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:33,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1146381091, now seen corresponding path program 15 times [2021-03-10 23:29:33,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:33,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449888070] [2021-03-10 23:29:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449888070] [2021-03-10 23:29:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386363362] [2021-03-10 23:29:34,202 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 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 [2021-03-10 23:29:34,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:29:34,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:34,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:29:34,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:34,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:34,488 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 43 treesize of output 59 [2021-03-10 23:29:34,676 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:34,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:34,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:34,743 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 35 treesize of output 51 [2021-03-10 23:29:34,936 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:35,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:35,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:35,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:29:35,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:29:35,175 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:29:35,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:35,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:35,275 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:406 [2021-03-10 23:29:35,489 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-03-10 23:29:35,682 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:29:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:35,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:35,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-03-10 23:29:35,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287673352] [2021-03-10 23:29:35,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:29:35,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:29:35,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:29:35,737 INFO L87 Difference]: Start difference. First operand 2965 states and 9768 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:36,384 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-03-10 23:29:36,882 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-03-10 23:29:37,075 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-03-10 23:29:40,071 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 23:29:42,961 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 23:29:47,910 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-03-10 23:29:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:48,718 INFO L93 Difference]: Finished difference Result 4327 states and 13842 transitions. [2021-03-10 23:29:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:29:48,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:48,727 INFO L225 Difference]: With dead ends: 4327 [2021-03-10 23:29:48,727 INFO L226 Difference]: Without dead ends: 4312 [2021-03-10 23:29:48,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 7041.7ms TimeCoverageRelationStatistics Valid=412, Invalid=2668, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:29:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-03-10 23:29:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2980. [2021-03-10 23:29:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 3.300100704934542) internal successors, (9831), 2979 states have internal predecessors, (9831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 9831 transitions. [2021-03-10 23:29:48,784 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 9831 transitions. Word has length 30 [2021-03-10 23:29:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:48,784 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 9831 transitions. [2021-03-10 23:29:48,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 9831 transitions. [2021-03-10 23:29:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:48,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:48,789 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:48,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-03-10 23:29:48,990 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash 343355019, now seen corresponding path program 16 times [2021-03-10 23:29:48,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:48,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720644288] [2021-03-10 23:29:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:49,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720644288] [2021-03-10 23:29:49,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13015999] [2021-03-10 23:29:49,462 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 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 [2021-03-10 23:29:49,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:29:49,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:49,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:29:49,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:49,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:49,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:49,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-03-10 23:29:49,844 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:49,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:49,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:49,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:49,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-03-10 23:29:49,920 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:49,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:49,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:49,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:29:49,999 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:29:50,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:50,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:50,090 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-03-10 23:29:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:50,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:50,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:29:50,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74141936] [2021-03-10 23:29:50,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:29:50,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:50,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:29:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:29:50,180 INFO L87 Difference]: Start difference. First operand 2980 states and 9831 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:51,715 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-03-10 23:29:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:53,202 INFO L93 Difference]: Finished difference Result 4895 states and 15652 transitions. [2021-03-10 23:29:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:29:53,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:53,210 INFO L225 Difference]: With dead ends: 4895 [2021-03-10 23:29:53,211 INFO L226 Difference]: Without dead ends: 4855 [2021-03-10 23:29:53,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 2534.8ms TimeCoverageRelationStatistics Valid=366, Invalid=2390, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:29:53,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-03-10 23:29:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 2946. [2021-03-10 23:29:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 3.293718166383701) internal successors, (9700), 2945 states have internal predecessors, (9700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 9700 transitions. [2021-03-10 23:29:53,262 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 9700 transitions. Word has length 30 [2021-03-10 23:29:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:53,262 INFO L480 AbstractCegarLoop]: Abstraction has 2946 states and 9700 transitions. [2021-03-10 23:29:53,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 9700 transitions. [2021-03-10 23:29:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:53,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:53,266 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:53,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:53,466 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:53,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:53,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1687268047, now seen corresponding path program 17 times [2021-03-10 23:29:53,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:53,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934609081] [2021-03-10 23:29:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934609081] [2021-03-10 23:29:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016719576] [2021-03-10 23:29:53,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:53,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:29:53,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:53,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:29:53,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:54,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:54,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-03-10 23:29:54,110 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:54,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:54,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:54,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-03-10 23:29:54,160 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:54,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:54,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:54,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:29:54,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:29:54,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:54,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:54,285 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-03-10 23:29:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:54,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:54,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:29:54,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620321514] [2021-03-10 23:29:54,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:29:54,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:54,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:29:54,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:29:54,365 INFO L87 Difference]: Start difference. First operand 2946 states and 9700 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:56,796 INFO L93 Difference]: Finished difference Result 4114 states and 13323 transitions. [2021-03-10 23:29:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:29:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:56,804 INFO L225 Difference]: With dead ends: 4114 [2021-03-10 23:29:56,804 INFO L226 Difference]: Without dead ends: 4089 [2021-03-10 23:29:56,804 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1831.3ms TimeCoverageRelationStatistics Valid=295, Invalid=2155, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:29:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-03-10 23:29:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 2929. [2021-03-10 23:29:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2928 states have (on average 3.2954234972677594) internal successors, (9649), 2928 states have internal predecessors, (9649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 9649 transitions. [2021-03-10 23:29:56,847 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 9649 transitions. Word has length 30 [2021-03-10 23:29:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:56,847 INFO L480 AbstractCegarLoop]: Abstraction has 2929 states and 9649 transitions. [2021-03-10 23:29:56,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 9649 transitions. [2021-03-10 23:29:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:56,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:56,850 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:57,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-03-10 23:29:57,059 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:57,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:57,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1927255107, now seen corresponding path program 18 times [2021-03-10 23:29:57,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:57,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705421682] [2021-03-10 23:29:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:57,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705421682] [2021-03-10 23:29:57,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353280456] [2021-03-10 23:29:57,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:57,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:29:57,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:57,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:29:57,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:57,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:57,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 23:29:57,761 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:57,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:57,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:57,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:57,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:29:57,775 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:29:57,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:57,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:57,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:29:57,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:57,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:57,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:57,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-03-10 23:29:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:57,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:57,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:29:57,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338154475] [2021-03-10 23:29:57,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:29:57,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:29:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:29:57,828 INFO L87 Difference]: Start difference. First operand 2929 states and 9649 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) [2021-03-10 23:30:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:00,067 INFO L93 Difference]: Finished difference Result 4053 states and 13078 transitions. [2021-03-10 23:30:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:30:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:00,076 INFO L225 Difference]: With dead ends: 4053 [2021-03-10 23:30:00,076 INFO L226 Difference]: Without dead ends: 4034 [2021-03-10 23:30:00,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1682.9ms TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:30:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2021-03-10 23:30:00,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 2966. [2021-03-10 23:30:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 3.2984822934232714) internal successors, (9780), 2965 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 9780 transitions. [2021-03-10 23:30:00,126 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 9780 transitions. Word has length 30 [2021-03-10 23:30:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:00,126 INFO L480 AbstractCegarLoop]: Abstraction has 2966 states and 9780 transitions. [2021-03-10 23:30:00,126 INFO L481 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) [2021-03-10 23:30:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 9780 transitions. [2021-03-10 23:30:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:00,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:00,131 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:00,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:00,332 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1283174873, now seen corresponding path program 19 times [2021-03-10 23:30:00,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:00,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028998252] [2021-03-10 23:30:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:00,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028998252] [2021-03-10 23:30:00,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578816472] [2021-03-10 23:30:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:00,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:30:00,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:01,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:01,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:01,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:01,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-03-10 23:30:01,122 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:01,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:01,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:01,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:01,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:01,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-03-10 23:30:01,184 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:01,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:01,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:01,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 53 [2021-03-10 23:30:01,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:01,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:01,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:01,328 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:17 [2021-03-10 23:30:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:01,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:01,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:30:01,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865652818] [2021-03-10 23:30:01,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:30:01,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:30:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:30:01,390 INFO L87 Difference]: Start difference. First operand 2966 states and 9780 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:04,054 INFO L93 Difference]: Finished difference Result 4451 states and 14271 transitions. [2021-03-10 23:30:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:30:04,055 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:04,062 INFO L225 Difference]: With dead ends: 4451 [2021-03-10 23:30:04,063 INFO L226 Difference]: Without dead ends: 4399 [2021-03-10 23:30:04,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 2181.9ms TimeCoverageRelationStatistics Valid=357, Invalid=2613, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:30:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2021-03-10 23:30:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 2983. [2021-03-10 23:30:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 3.295103957075788) internal successors, (9826), 2982 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 9826 transitions. [2021-03-10 23:30:04,108 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 9826 transitions. Word has length 30 [2021-03-10 23:30:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:04,108 INFO L480 AbstractCegarLoop]: Abstraction has 2983 states and 9826 transitions. [2021-03-10 23:30:04,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 9826 transitions. [2021-03-10 23:30:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:04,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:04,112 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:04,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-03-10 23:30:04,313 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:04,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1617097255, now seen corresponding path program 20 times [2021-03-10 23:30:04,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:04,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802076959] [2021-03-10 23:30:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:04,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802076959] [2021-03-10 23:30:04,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717569450] [2021-03-10 23:30:04,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:04,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:30:04,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:30:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:04,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:04,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:04,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:04,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-03-10 23:30:04,968 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:04,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:04,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:04,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:04,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:04,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-03-10 23:30:05,022 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:05,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:05,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:05,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 49 [2021-03-10 23:30:05,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:05,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:05,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:05,194 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-03-10 23:30:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:05,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:05,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:30:05,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524747144] [2021-03-10 23:30:05,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:30:05,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:30:05,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:30:05,280 INFO L87 Difference]: Start difference. First operand 2983 states and 9826 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:07,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:07,433 INFO L93 Difference]: Finished difference Result 4347 states and 14097 transitions. [2021-03-10 23:30:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:30:07,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:07,442 INFO L225 Difference]: With dead ends: 4347 [2021-03-10 23:30:07,442 INFO L226 Difference]: Without dead ends: 4322 [2021-03-10 23:30:07,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1946.4ms TimeCoverageRelationStatistics Valid=386, Invalid=2064, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:30:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-03-10 23:30:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 2977. [2021-03-10 23:30:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.294690860215054) internal successors, (9805), 2976 states have internal predecessors, (9805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9805 transitions. [2021-03-10 23:30:07,502 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9805 transitions. Word has length 30 [2021-03-10 23:30:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:07,502 INFO L480 AbstractCegarLoop]: Abstraction has 2977 states and 9805 transitions. [2021-03-10 23:30:07,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9805 transitions. [2021-03-10 23:30:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:07,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:07,506 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:07,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:07,707 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1125774645, now seen corresponding path program 21 times [2021-03-10 23:30:07,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:07,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413654332] [2021-03-10 23:30:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:08,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413654332] [2021-03-10 23:30:08,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809040007] [2021-03-10 23:30:08,165 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 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 [2021-03-10 23:30:08,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:30:08,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:30:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:08,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:08,465 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 43 treesize of output 59 [2021-03-10 23:30:08,615 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:08,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:08,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:08,672 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 35 treesize of output 51 [2021-03-10 23:30:08,776 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:08,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:08,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:08,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:30:08,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:08,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:09,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:09,134 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:620 [2021-03-10 23:30:09,442 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-10 23:30:09,731 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 23:30:09,884 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 23:30:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:09,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:09,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 23:30:09,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273930563] [2021-03-10 23:30:09,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:30:09,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:09,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:30:09,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:30:09,925 INFO L87 Difference]: Start difference. First operand 2977 states and 9805 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:10,374 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 41 [2021-03-10 23:30:10,648 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 23:30:10,806 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 43 [2021-03-10 23:30:10,944 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 38 [2021-03-10 23:30:11,160 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 51 [2021-03-10 23:30:11,529 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-03-10 23:30:11,750 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 57 [2021-03-10 23:30:12,048 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 23:30:12,199 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-03-10 23:30:12,360 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2021-03-10 23:30:12,592 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-03-10 23:30:12,793 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-03-10 23:30:13,040 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2021-03-10 23:30:13,197 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 28 [2021-03-10 23:30:13,513 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 23:30:13,884 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-03-10 23:30:14,033 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-03-10 23:30:14,285 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2021-03-10 23:30:14,728 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-03-10 23:30:15,036 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2021-03-10 23:30:15,639 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-03-10 23:30:16,208 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-03-10 23:30:16,508 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2021-03-10 23:30:17,338 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-03-10 23:30:17,997 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 23:30:18,157 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-03-10 23:30:18,341 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-03-10 23:30:18,648 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2021-03-10 23:30:18,843 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2021-03-10 23:30:19,309 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-03-10 23:30:19,515 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2021-03-10 23:30:19,756 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-03-10 23:30:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:19,856 INFO L93 Difference]: Finished difference Result 4882 states and 15331 transitions. [2021-03-10 23:30:19,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 23:30:19,857 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:19,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:19,865 INFO L225 Difference]: With dead ends: 4882 [2021-03-10 23:30:19,865 INFO L226 Difference]: Without dead ends: 4823 [2021-03-10 23:30:19,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 9108.3ms TimeCoverageRelationStatistics Valid=839, Invalid=6133, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:30:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-03-10 23:30:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 3071. [2021-03-10 23:30:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 3070 states have (on average 3.3039087947882737) internal successors, (10143), 3070 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 10143 transitions. [2021-03-10 23:30:19,916 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 10143 transitions. Word has length 30 [2021-03-10 23:30:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:19,916 INFO L480 AbstractCegarLoop]: Abstraction has 3071 states and 10143 transitions. [2021-03-10 23:30:19,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 10143 transitions. [2021-03-10 23:30:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:19,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:19,920 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:20,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-03-10 23:30:20,125 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2109435335, now seen corresponding path program 22 times [2021-03-10 23:30:20,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:20,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947364006] [2021-03-10 23:30:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:20,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947364006] [2021-03-10 23:30:20,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790373630] [2021-03-10 23:30:20,685 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 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 [2021-03-10 23:30:20,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:30:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:20,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:30:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:20,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:20,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:20,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:20,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:20,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 62 [2021-03-10 23:30:21,004 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:21,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:21,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:21,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:21,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 48 [2021-03-10 23:30:21,073 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:21,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:21,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:21,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 52 [2021-03-10 23:30:21,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:21,280 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 23:30:21,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:21,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:21,303 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:82, output treesize:43 [2021-03-10 23:30:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:21,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:21,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-03-10 23:30:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777516947] [2021-03-10 23:30:21,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:30:21,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:21,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:30:21,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:30:21,390 INFO L87 Difference]: Start difference. First operand 3071 states and 10143 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:23,241 INFO L93 Difference]: Finished difference Result 4500 states and 14533 transitions. [2021-03-10 23:30:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:30:23,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:23,250 INFO L225 Difference]: With dead ends: 4500 [2021-03-10 23:30:23,250 INFO L226 Difference]: Without dead ends: 4475 [2021-03-10 23:30:23,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1811.0ms TimeCoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:30:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2021-03-10 23:30:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3058. [2021-03-10 23:30:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3057 states have (on average 3.298985933922146) internal successors, (10085), 3057 states have internal predecessors, (10085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 10085 transitions. [2021-03-10 23:30:23,300 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 10085 transitions. Word has length 30 [2021-03-10 23:30:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:23,300 INFO L480 AbstractCegarLoop]: Abstraction has 3058 states and 10085 transitions. [2021-03-10 23:30:23,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 10085 transitions. [2021-03-10 23:30:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:23,305 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:23,305 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:23,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-03-10 23:30:23,505 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:23,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1666940615, now seen corresponding path program 23 times [2021-03-10 23:30:23,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:23,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887729660] [2021-03-10 23:30:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:24,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887729660] [2021-03-10 23:30:24,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287068362] [2021-03-10 23:30:24,096 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 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 [2021-03-10 23:30:24,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:30:24,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:30:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:24,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:24,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:24,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 60 [2021-03-10 23:30:24,458 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:24,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:24,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:24,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:24,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2021-03-10 23:30:24,518 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:24,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:24,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:24,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 52 [2021-03-10 23:30:24,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:24,799 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-03-10 23:30:24,800 INFO L628 ElimStorePlain]: treesize reduction 56, result has 81.8 percent of original size [2021-03-10 23:30:24,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:24,840 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:57 [2021-03-10 23:30:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:24,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:24,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-03-10 23:30:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096560837] [2021-03-10 23:30:24,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:30:24,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:30:24,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:30:24,942 INFO L87 Difference]: Start difference. First operand 3058 states and 10085 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-03-10 23:30:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:27,036 INFO L93 Difference]: Finished difference Result 3870 states and 12382 transitions. [2021-03-10 23:30:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:30:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:27,043 INFO L225 Difference]: With dead ends: 3870 [2021-03-10 23:30:27,043 INFO L226 Difference]: Without dead ends: 3832 [2021-03-10 23:30:27,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1735.5ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:30:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-03-10 23:30:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 3022. [2021-03-10 23:30:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 3021 states have (on average 3.3025488248924195) internal successors, (9977), 3021 states have internal predecessors, (9977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 9977 transitions. [2021-03-10 23:30:27,085 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 9977 transitions. Word has length 30 [2021-03-10 23:30:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:27,086 INFO L480 AbstractCegarLoop]: Abstraction has 3022 states and 9977 transitions. [2021-03-10 23:30:27,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-03-10 23:30:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 9977 transitions. [2021-03-10 23:30:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:27,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:27,089 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:27,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:27,290 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:27,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1357407609, now seen corresponding path program 24 times [2021-03-10 23:30:27,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:27,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098150275] [2021-03-10 23:30:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:27,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098150275] [2021-03-10 23:30:27,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947233372] [2021-03-10 23:30:27,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:30:27,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:30:27,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:30:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:28,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:28,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:28,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-03-10 23:30:28,196 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:28,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:28,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:28,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:28,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-03-10 23:30:28,265 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:28,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:28,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:28,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:30:28,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:28,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:28,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:28,423 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:92 [2021-03-10 23:30:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:28,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:28,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 23:30:28,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620622271] [2021-03-10 23:30:28,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:30:28,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:28,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:30:28,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:30:28,544 INFO L87 Difference]: Start difference. First operand 3022 states and 9977 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:30,006 INFO L93 Difference]: Finished difference Result 3512 states and 11471 transitions. [2021-03-10 23:30:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:30:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:30,013 INFO L225 Difference]: With dead ends: 3512 [2021-03-10 23:30:30,013 INFO L226 Difference]: Without dead ends: 3483 [2021-03-10 23:30:30,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1472.4ms TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:30:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2021-03-10 23:30:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 3046. [2021-03-10 23:30:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.302791461412151) internal successors, (10057), 3045 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 10057 transitions. [2021-03-10 23:30:30,054 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 10057 transitions. Word has length 30 [2021-03-10 23:30:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:30,054 INFO L480 AbstractCegarLoop]: Abstraction has 3046 states and 10057 transitions. [2021-03-10 23:30:30,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 10057 transitions. [2021-03-10 23:30:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:30,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:30,057 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:30,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:30,258 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:30,258 INFO L82 PathProgramCache]: Analyzing trace with hash 346735623, now seen corresponding path program 25 times [2021-03-10 23:30:30,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:30,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432534608] [2021-03-10 23:30:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:30,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432534608] [2021-03-10 23:30:30,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108185599] [2021-03-10 23:30:30,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:30:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:30,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:30:30,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:30,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:31,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-03-10 23:30:31,033 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:31,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:31,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:31,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-03-10 23:30:31,089 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:31,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:31,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:31,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:30:31,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:31,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:31,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:31,233 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-03-10 23:30:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:31,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:31,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:30:31,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641693668] [2021-03-10 23:30:31,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:30:31,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:30:31,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:30:31,324 INFO L87 Difference]: Start difference. First operand 3046 states and 10057 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:33,514 INFO L93 Difference]: Finished difference Result 4229 states and 13744 transitions. [2021-03-10 23:30:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:30:33,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:33,522 INFO L225 Difference]: With dead ends: 4229 [2021-03-10 23:30:33,522 INFO L226 Difference]: Without dead ends: 4204 [2021-03-10 23:30:33,523 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1954.7ms TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:30:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2021-03-10 23:30:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 3054. [2021-03-10 23:30:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3053 states have (on average 3.3019980347199476) internal successors, (10081), 3053 states have internal predecessors, (10081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 10081 transitions. [2021-03-10 23:30:33,573 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 10081 transitions. Word has length 30 [2021-03-10 23:30:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:33,573 INFO L480 AbstractCegarLoop]: Abstraction has 3054 states and 10081 transitions. [2021-03-10 23:30:33,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 10081 transitions. [2021-03-10 23:30:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:33,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:33,578 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:33,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-03-10 23:30:33,778 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:33,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1303532813, now seen corresponding path program 26 times [2021-03-10 23:30:33,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:33,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65748428] [2021-03-10 23:30:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:34,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65748428] [2021-03-10 23:30:34,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538116448] [2021-03-10 23:30:34,225 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 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 [2021-03-10 23:30:34,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:30:34,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:34,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:30:34,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:34,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:34,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-03-10 23:30:34,507 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:34,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:34,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:34,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:34,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-03-10 23:30:34,573 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:34,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:34,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:34,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:30:34,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:34,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:34,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:34,717 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-03-10 23:30:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:34,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:34,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:30:34,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49714755] [2021-03-10 23:30:34,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:30:34,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:34,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:30:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:30:34,819 INFO L87 Difference]: Start difference. First operand 3054 states and 10081 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:35,274 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-03-10 23:30:35,424 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-03-10 23:30:36,034 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 23:30:36,612 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:30:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:37,660 INFO L93 Difference]: Finished difference Result 4156 states and 13532 transitions. [2021-03-10 23:30:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:30:37,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:37,670 INFO L225 Difference]: With dead ends: 4156 [2021-03-10 23:30:37,670 INFO L226 Difference]: Without dead ends: 4131 [2021-03-10 23:30:37,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2255.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:30:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-03-10 23:30:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3062. [2021-03-10 23:30:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3061 states have (on average 3.3012087553087226) internal successors, (10105), 3061 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 10105 transitions. [2021-03-10 23:30:37,720 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 10105 transitions. Word has length 30 [2021-03-10 23:30:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:37,721 INFO L480 AbstractCegarLoop]: Abstraction has 3062 states and 10105 transitions. [2021-03-10 23:30:37,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 10105 transitions. [2021-03-10 23:30:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:37,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:37,725 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:37,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:37,925 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:37,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1246827581, now seen corresponding path program 27 times [2021-03-10 23:30:37,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:37,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595710852] [2021-03-10 23:30:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:38,225 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:30:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:38,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595710852] [2021-03-10 23:30:38,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967473105] [2021-03-10 23:30:38,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:38,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:30:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:30:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:38,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:38,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:38,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-03-10 23:30:39,002 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:39,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:39,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:39,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:39,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-03-10 23:30:39,060 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:39,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:39,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:39,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:30:39,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:39,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:39,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:39,213 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:28 [2021-03-10 23:30:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:39,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:39,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:30:39,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443593633] [2021-03-10 23:30:39,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:30:39,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:39,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:30:39,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:30:39,326 INFO L87 Difference]: Start difference. First operand 3062 states and 10105 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:40,809 INFO L93 Difference]: Finished difference Result 4306 states and 13968 transitions. [2021-03-10 23:30:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:30:40,810 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:40,818 INFO L225 Difference]: With dead ends: 4306 [2021-03-10 23:30:40,818 INFO L226 Difference]: Without dead ends: 4281 [2021-03-10 23:30:40,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1679.5ms TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:30:40,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-03-10 23:30:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 3054. [2021-03-10 23:30:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3053 states have (on average 3.3019980347199476) internal successors, (10081), 3053 states have internal predecessors, (10081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 10081 transitions. [2021-03-10 23:30:40,865 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 10081 transitions. Word has length 30 [2021-03-10 23:30:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:40,865 INFO L480 AbstractCegarLoop]: Abstraction has 3054 states and 10081 transitions. [2021-03-10 23:30:40,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 10081 transitions. [2021-03-10 23:30:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:40,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:40,870 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:41,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-03-10 23:30:41,070 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash -19226196, now seen corresponding path program 44 times [2021-03-10 23:30:41,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:41,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353238820] [2021-03-10 23:30:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:41,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353238820] [2021-03-10 23:30:41,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434266551] [2021-03-10 23:30:41,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:41,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:30:41,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:30:41,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:42,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:42,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:42,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:42,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:30:42,144 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:42,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:42,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:42,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:42,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:42,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:42,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:30:42,164 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:42,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:42,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:30:42,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:30:42,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:42,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:42,202 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:30:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:42,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:42,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:30:42,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32982786] [2021-03-10 23:30:42,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:30:42,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:30:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:30:42,241 INFO L87 Difference]: Start difference. First operand 3054 states and 10081 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:46,625 INFO L93 Difference]: Finished difference Result 4060 states and 12999 transitions. [2021-03-10 23:30:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:30:46,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:46,633 INFO L225 Difference]: With dead ends: 4060 [2021-03-10 23:30:46,633 INFO L226 Difference]: Without dead ends: 4034 [2021-03-10 23:30:46,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3624.7ms TimeCoverageRelationStatistics Valid=515, Invalid=3145, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:30:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2021-03-10 23:30:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 3048. [2021-03-10 23:30:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3047 states have (on average 3.303577289136856) internal successors, (10066), 3047 states have internal predecessors, (10066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 10066 transitions. [2021-03-10 23:30:46,683 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 10066 transitions. Word has length 30 [2021-03-10 23:30:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:46,683 INFO L480 AbstractCegarLoop]: Abstraction has 3048 states and 10066 transitions. [2021-03-10 23:30:46,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:46,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 10066 transitions. [2021-03-10 23:30:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:46,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:46,687 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:46,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:46,888 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash -196266222, now seen corresponding path program 45 times [2021-03-10 23:30:46,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:46,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238274429] [2021-03-10 23:30:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:47,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238274429] [2021-03-10 23:30:47,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751677972] [2021-03-10 23:30:47,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:47,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:30:47,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:47,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:30:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:47,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:47,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-03-10 23:30:48,073 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:48,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:48,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:48,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:48,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:48,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-03-10 23:30:48,299 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:30:48,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:48,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:48,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-03-10 23:30:48,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:30:49,314 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 110 [2021-03-10 23:30:49,315 INFO L628 ElimStorePlain]: treesize reduction 1216, result has 41.4 percent of original size [2021-03-10 23:30:49,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:49,585 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:56, output treesize:69 [2021-03-10 23:30:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:49,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:49,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-03-10 23:30:49,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503032061] [2021-03-10 23:30:49,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:30:49,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:30:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:30:49,749 INFO L87 Difference]: Start difference. First operand 3048 states and 10066 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:55,198 INFO L93 Difference]: Finished difference Result 4230 states and 13506 transitions. [2021-03-10 23:30:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:30:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:55,208 INFO L225 Difference]: With dead ends: 4230 [2021-03-10 23:30:55,208 INFO L226 Difference]: Without dead ends: 4189 [2021-03-10 23:30:55,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 3856.7ms TimeCoverageRelationStatistics Valid=557, Invalid=4845, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:30:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-03-10 23:30:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3088. [2021-03-10 23:30:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 3.298995788791707) internal successors, (10184), 3087 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 10184 transitions. [2021-03-10 23:30:55,261 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 10184 transitions. Word has length 30 [2021-03-10 23:30:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:55,261 INFO L480 AbstractCegarLoop]: Abstraction has 3088 states and 10184 transitions. [2021-03-10 23:30:55,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 10184 transitions. [2021-03-10 23:30:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:55,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:55,266 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:55,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:55,466 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash -158503640, now seen corresponding path program 46 times [2021-03-10 23:30:55,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:55,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237676914] [2021-03-10 23:30:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:55,723 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-10 23:30:55,914 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 23:30:56,068 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 23:30:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:56,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237676914] [2021-03-10 23:30:56,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304671567] [2021-03-10 23:30:56,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:56,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:30:56,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:30:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:31:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:00,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:00,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:00,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:31:00,625 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:31:00,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:31:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:00,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:00,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:00,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:31:00,645 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:31:00,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:31:00,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:31:00,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:31:00,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:31:00,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:31:00,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:31:00,685 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:31:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:00,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:31:00,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-03-10 23:31:00,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647369718] [2021-03-10 23:31:00,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:31:00,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:31:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:31:00,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=383, Unknown=2, NotChecked=0, Total=462 [2021-03-10 23:31:00,743 INFO L87 Difference]: Start difference. First operand 3088 states and 10184 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-03-10 23:31:55,512 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-10 23:32:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:08,753 INFO L93 Difference]: Finished difference Result 4213 states and 13613 transitions. [2021-03-10 23:32:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:32:08,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:32:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:08,763 INFO L225 Difference]: With dead ends: 4213 [2021-03-10 23:32:08,763 INFO L226 Difference]: Without dead ends: 4187 [2021-03-10 23:32:08,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 29100.6ms TimeCoverageRelationStatistics Valid=517, Invalid=3009, Unknown=14, NotChecked=0, Total=3540 [2021-03-10 23:32:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2021-03-10 23:32:08,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 3108. [2021-03-10 23:32:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 3.293852590923721) internal successors, (10234), 3107 states have internal predecessors, (10234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 10234 transitions. [2021-03-10 23:32:08,813 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 10234 transitions. Word has length 30 [2021-03-10 23:32:08,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:08,813 INFO L480 AbstractCegarLoop]: Abstraction has 3108 states and 10234 transitions. [2021-03-10 23:32:08,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-03-10 23:32:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 10234 transitions. [2021-03-10 23:32:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:32:08,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:08,817 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:09,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-03-10 23:32:09,018 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:09,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1416212346, now seen corresponding path program 47 times [2021-03-10 23:32:09,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:09,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197338335] [2021-03-10 23:32:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:09,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197338335] [2021-03-10 23:32:09,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653004964] [2021-03-10 23:32:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:09,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:32:09,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:32:09,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:10,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:10,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:10,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:32:10,132 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:10,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:10,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:10,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:10,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:10,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:32:10,158 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:10,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:10,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:10,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:32:10,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:32:10,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:10,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:32:10,207 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:32:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:10,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:10,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:32:10,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872862687] [2021-03-10 23:32:10,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:32:10,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:10,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:32:10,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:32:10,245 INFO L87 Difference]: Start difference. First operand 3108 states and 10234 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:12,157 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-10 23:32:12,354 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-10 23:32:12,683 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-10 23:32:12,898 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-10 23:32:13,151 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2021-03-10 23:32:13,460 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-10 23:32:13,751 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:32:14,186 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-03-10 23:32:14,568 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-03-10 23:32:14,939 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-10 23:32:15,747 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-03-10 23:32:16,090 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 23:32:16,523 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:32:16,833 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-03-10 23:32:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:17,517 INFO L93 Difference]: Finished difference Result 4038 states and 12975 transitions. [2021-03-10 23:32:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:32:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:32:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:17,528 INFO L225 Difference]: With dead ends: 4038 [2021-03-10 23:32:17,529 INFO L226 Difference]: Without dead ends: 4012 [2021-03-10 23:32:17,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 5851.4ms TimeCoverageRelationStatistics Valid=546, Invalid=3360, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:32:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2021-03-10 23:32:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3108. [2021-03-10 23:32:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 3.293852590923721) internal successors, (10234), 3107 states have internal predecessors, (10234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 10234 transitions. [2021-03-10 23:32:17,587 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 10234 transitions. Word has length 30 [2021-03-10 23:32:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:17,587 INFO L480 AbstractCegarLoop]: Abstraction has 3108 states and 10234 transitions. [2021-03-10 23:32:17,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 10234 transitions. [2021-03-10 23:32:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:32:17,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:17,593 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:17,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable973 [2021-03-10 23:32:17,794 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:17,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1423534595, now seen corresponding path program 28 times [2021-03-10 23:32:17,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:17,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665580465] [2021-03-10 23:32:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:18,060 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 23:32:18,262 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:32:18,483 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:32:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:18,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665580465] [2021-03-10 23:32:18,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024832474] [2021-03-10 23:32:18,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:18,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:32:18,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:18,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:32:18,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:19,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:19,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:19,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 23:32:19,522 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:19,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:19,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:19,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:32:19,564 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:19,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:19,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:19,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:32:19,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:32:19,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:19,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:32:19,668 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:10 [2021-03-10 23:32:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:19,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:19,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:32:19,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953661621] [2021-03-10 23:32:19,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:32:19,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:19,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:32:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:32:19,794 INFO L87 Difference]: Start difference. First operand 3108 states and 10234 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:20,060 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:32:20,222 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 23:32:20,583 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-10 23:32:20,768 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 23:32:21,088 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 23:32:21,281 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 23:32:21,584 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 23:32:22,247 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-10 23:32:22,638 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-03-10 23:32:23,075 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-03-10 23:32:23,365 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-03-10 23:32:23,846 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 23:32:24,090 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 23:32:24,295 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 23:32:24,620 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 23:32:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:24,971 INFO L93 Difference]: Finished difference Result 4340 states and 13886 transitions. [2021-03-10 23:32:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:32:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:32:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:24,982 INFO L225 Difference]: With dead ends: 4340 [2021-03-10 23:32:24,982 INFO L226 Difference]: Without dead ends: 4325 [2021-03-10 23:32:24,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 5213.0ms TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:32:24,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4325 states. [2021-03-10 23:32:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4325 to 3133. [2021-03-10 23:32:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 3132 states have (on average 3.2988505747126435) internal successors, (10332), 3132 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 10332 transitions. [2021-03-10 23:32:25,046 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 10332 transitions. Word has length 30 [2021-03-10 23:32:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:25,046 INFO L480 AbstractCegarLoop]: Abstraction has 3133 states and 10332 transitions. [2021-03-10 23:32:25,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 10332 transitions. [2021-03-10 23:32:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:32:25,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:25,051 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:25,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable974,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:25,252 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:25,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1177838777, now seen corresponding path program 29 times [2021-03-10 23:32:25,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:25,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5410050] [2021-03-10 23:32:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:25,536 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:32:25,669 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:32:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:26,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5410050] [2021-03-10 23:32:26,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954288485] [2021-03-10 23:32:26,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:26,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:32:26,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:32:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:26,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:26,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-03-10 23:32:26,778 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:26,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:26,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:26,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:26,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-03-10 23:32:26,824 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:26,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:26,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:26,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-03-10 23:32:26,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:32:26,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:26,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:32:26,891 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:60, output treesize:7 [2021-03-10 23:32:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:26,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:26,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 23:32:26,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184477523] [2021-03-10 23:32:26,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:32:26,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:26,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:32:26,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:32:26,953 INFO L87 Difference]: Start difference. First operand 3133 states and 10332 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:27,556 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-10 23:32:28,319 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 23:32:28,569 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-10 23:32:28,885 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:32:29,296 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-10 23:32:29,721 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-03-10 23:32:30,078 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-03-10 23:32:30,475 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-10 23:32:30,708 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-03-10 23:32:31,409 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-03-10 23:32:32,219 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:32:32,993 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-03-10 23:32:33,537 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-03-10 23:32:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:34,380 INFO L93 Difference]: Finished difference Result 4465 states and 14258 transitions. [2021-03-10 23:32:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:32:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:32:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:34,390 INFO L225 Difference]: With dead ends: 4465 [2021-03-10 23:32:34,390 INFO L226 Difference]: Without dead ends: 4450 [2021-03-10 23:32:34,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 5591.8ms TimeCoverageRelationStatistics Valid=588, Invalid=2952, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:32:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2021-03-10 23:32:34,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3144. [2021-03-10 23:32:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 3.300031816735603) internal successors, (10372), 3143 states have internal predecessors, (10372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 10372 transitions. [2021-03-10 23:32:34,450 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 10372 transitions. Word has length 30 [2021-03-10 23:32:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:34,450 INFO L480 AbstractCegarLoop]: Abstraction has 3144 states and 10372 transitions. [2021-03-10 23:32:34,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 10372 transitions. [2021-03-10 23:32:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:32:34,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:34,455 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:34,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:34,671 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:34,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1311580383, now seen corresponding path program 30 times [2021-03-10 23:32:34,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:34,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427608006] [2021-03-10 23:32:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:34,947 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:32:35,083 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:32:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427608006] [2021-03-10 23:32:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817033115] [2021-03-10 23:32:35,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:35,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:32:35,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:35,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:32:35,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:35,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:35,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-03-10 23:32:35,761 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:35,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:35,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:35,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:35,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:35,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-03-10 23:32:35,861 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:35,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:35,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:35,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 49 [2021-03-10 23:32:35,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:32:36,057 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:32:36,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:36,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:32:36,080 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-03-10 23:32:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:36,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:36,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:32:36,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512466300] [2021-03-10 23:32:36,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:32:36,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:32:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:32:36,226 INFO L87 Difference]: Start difference. First operand 3144 states and 10372 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:36,976 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 23:32:37,132 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-10 23:32:37,883 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-10 23:32:38,128 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-10 23:32:38,418 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 23:32:38,567 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:32:38,796 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-03-10 23:32:39,091 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-10 23:32:39,567 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-10 23:32:39,817 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-03-10 23:32:40,171 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-03-10 23:32:40,504 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-03-10 23:32:41,083 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 23:32:41,386 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-03-10 23:32:41,523 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-10 23:32:41,873 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-10 23:32:42,147 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 23:32:42,405 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 23:32:43,257 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 23:32:43,571 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-03-10 23:32:44,186 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 23:32:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:45,084 INFO L93 Difference]: Finished difference Result 5055 states and 16170 transitions. [2021-03-10 23:32:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:32:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:32:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:45,095 INFO L225 Difference]: With dead ends: 5055 [2021-03-10 23:32:45,095 INFO L226 Difference]: Without dead ends: 5030 [2021-03-10 23:32:45,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 7033.1ms TimeCoverageRelationStatistics Valid=793, Invalid=4463, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:32:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2021-03-10 23:32:45,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 3127. [2021-03-10 23:32:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3127 states, 3126 states have (on average 3.299104286628279) internal successors, (10313), 3126 states have internal predecessors, (10313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 10313 transitions. [2021-03-10 23:32:45,146 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 10313 transitions. Word has length 30 [2021-03-10 23:32:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:45,146 INFO L480 AbstractCegarLoop]: Abstraction has 3127 states and 10313 transitions. [2021-03-10 23:32:45,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 10313 transitions. [2021-03-10 23:32:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:32:45,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:45,151 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:45,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-03-10 23:32:45,352 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:45,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1481027600, now seen corresponding path program 48 times [2021-03-10 23:32:45,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:45,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812630438] [2021-03-10 23:32:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:45,863 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 23:32:46,137 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:32:46,431 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:32:46,671 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:32:46,942 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-03-10 23:32:47,231 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:32:47,386 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:32:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:47,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812630438] [2021-03-10 23:32:47,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531382448] [2021-03-10 23:32:47,650 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 [2021-03-10 23:32:47,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:32:47,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:47,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:32:47,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:48,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:48,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:48,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:48,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:32:48,512 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:48,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:32:48,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:48,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:32:48,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:32:48,568 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:32:48,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:48,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:48,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:32:48,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:32:48,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:32:48,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:32:48,675 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:32:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:48,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:48,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-03-10 23:32:48,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428111532] [2021-03-10 23:32:48,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:32:48,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:48,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:32:48,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:32:48,766 INFO L87 Difference]: Start difference. First operand 3127 states and 10313 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:49,090 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2021-03-10 23:32:49,412 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-03-10 23:32:49,755 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-03-10 23:32:49,953 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2021-03-10 23:32:50,284 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-03-10 23:32:50,555 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-03-10 23:32:50,842 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:32:50,996 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:32:51,200 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-10 23:32:51,635 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-03-10 23:32:51,849 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 23:32:52,044 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:32:52,293 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:32:52,547 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-10 23:32:52,729 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-10 23:32:52,976 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:32:53,298 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-10 23:32:53,541 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-03-10 23:32:54,091 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 23:32:54,621 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-10 23:32:54,765 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-03-10 23:32:55,104 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-10 23:32:55,288 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:32:55,773 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-03-10 23:32:56,602 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 23:32:56,952 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 23:32:57,325 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-03-10 23:32:58,098 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-10 23:32:58,251 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 23:32:58,419 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 23:32:59,192 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 23:32:59,515 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:32:59,817 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 23:33:00,087 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 23:33:00,485 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:33:00,658 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-03-10 23:33:00,925 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 23:33:01,651 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-10 23:33:01,926 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-03-10 23:33:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:02,638 INFO L93 Difference]: Finished difference Result 4748 states and 15000 transitions. [2021-03-10 23:33:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 23:33:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:33:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:02,651 INFO L225 Difference]: With dead ends: 4748 [2021-03-10 23:33:02,651 INFO L226 Difference]: Without dead ends: 4719 [2021-03-10 23:33:02,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 13013.8ms TimeCoverageRelationStatistics Valid=1355, Invalid=7765, Unknown=0, NotChecked=0, Total=9120 [2021-03-10 23:33:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4719 states. [2021-03-10 23:33:02,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4719 to 3138. [2021-03-10 23:33:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 3.303474657315907) internal successors, (10363), 3137 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 10363 transitions. [2021-03-10 23:33:02,718 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 10363 transitions. Word has length 30 [2021-03-10 23:33:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:02,718 INFO L480 AbstractCegarLoop]: Abstraction has 3138 states and 10363 transitions. [2021-03-10 23:33:02,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 10363 transitions. [2021-03-10 23:33:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:33:02,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:02,724 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:02,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-03-10 23:33:02,925 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:02,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1515107700, now seen corresponding path program 49 times [2021-03-10 23:33:02,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:02,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506167024] [2021-03-10 23:33:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:03,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506167024] [2021-03-10 23:33:03,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016025725] [2021-03-10 23:33:03,812 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 [2021-03-10 23:33:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:33:03,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:04,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:33:04,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:33:04,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:33:04,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:33:04,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:33:04,379 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:33:04,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:33:04,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:33:04,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:33:04,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:33:04,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:33:04,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:33:04,408 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:33:04,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:33:04,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:33:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:33:04,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:33:04,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:33:04,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:33:04,467 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:33:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:04,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:04,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-03-10 23:33:04,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229175723] [2021-03-10 23:33:04,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:33:04,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:04,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:33:04,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:33:04,527 INFO L87 Difference]: Start difference. First operand 3138 states and 10363 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:05,246 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 23:33:05,543 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:33:06,147 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 23:33:06,294 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-10 23:33:06,562 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:33:07,006 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 23:33:07,327 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 23:33:08,079 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 23:33:08,307 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 23:33:08,543 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:33:08,971 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:33:09,671 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 23:33:09,856 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:33:10,111 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 23:33:10,844 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 23:33:11,181 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:33:11,379 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 23:33:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:11,870 INFO L93 Difference]: Finished difference Result 5697 states and 18046 transitions. [2021-03-10 23:33:11,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 23:33:11,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:33:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:11,885 INFO L225 Difference]: With dead ends: 5697 [2021-03-10 23:33:11,885 INFO L226 Difference]: Without dead ends: 5676 [2021-03-10 23:33:11,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 6052.4ms TimeCoverageRelationStatistics Valid=672, Invalid=4158, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 23:33:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-03-10 23:33:11,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 3281. [2021-03-10 23:33:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3281 states, 3280 states have (on average 3.303048780487805) internal successors, (10834), 3280 states have internal predecessors, (10834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3281 states to 3281 states and 10834 transitions. [2021-03-10 23:33:11,955 INFO L78 Accepts]: Start accepts. Automaton has 3281 states and 10834 transitions. Word has length 30 [2021-03-10 23:33:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:11,955 INFO L480 AbstractCegarLoop]: Abstraction has 3281 states and 10834 transitions. [2021-03-10 23:33:11,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3281 states and 10834 transitions. [2021-03-10 23:33:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:33:11,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:11,960 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:12,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable995,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:12,161 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1006751760, now seen corresponding path program 50 times [2021-03-10 23:33:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:12,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743626958] [2021-03-10 23:33:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:12,417 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 23:33:12,661 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:33:12,947 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 23:33:13,122 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 23:33:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743626958] [2021-03-10 23:33:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826383022] [2021-03-10 23:33:13,524 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 [2021-03-10 23:33:13,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:33:13,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:33:13,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:33:13,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:33:14,460 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 23:33:14,461 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-03-10 23:33:14,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 193 [2021-03-10 23:33:14,724 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:33:14,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:33:14,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:33:14,938 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 23:33:14,939 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-03-10 23:33:14,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 175 [2021-03-10 23:33:15,527 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:33:15,662 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 23:33:15,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:33:15,802 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:33:15,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:33:15,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 171 treesize of output 163 [2021-03-10 23:33:17,901 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 490 [2021-03-10 23:33:18,146 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 490 [2021-03-10 23:33:18,395 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 490 [2021-03-10 23:33:18,597 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 465 [2021-03-10 23:33:18,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 5 xjuncts. [2021-03-10 23:33:37,121 WARN L205 SmtUtils]: Spent 18.51 s on a formula simplification. DAG size of input: 492 DAG size of output: 270 [2021-03-10 23:33:37,123 INFO L628 ElimStorePlain]: treesize reduction 78402, result has 17.9 percent of original size [2021-03-10 23:33:37,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:33:37,978 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:210, output treesize:844 [2021-03-10 23:33:38,258 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2021-03-10 23:33:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:38,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:38,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-03-10 23:33:38,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087767006] [2021-03-10 23:33:38,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:33:38,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:38,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:33:38,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:33:38,350 INFO L87 Difference]: Start difference. First operand 3281 states and 10834 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:38,660 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:33:38,810 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-03-10 23:33:39,022 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:33:39,319 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-03-10 23:33:39,558 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-03-10 23:33:39,811 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 23:33:40,109 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 23:33:40,287 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:33:40,648 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-10 23:33:41,215 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 23:33:41,585 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-03-10 23:33:41,815 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-10 23:33:42,163 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-03-10 23:33:42,547 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-10 23:33:42,873 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-10 23:33:43,173 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-03-10 23:33:43,829 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-03-10 23:33:44,462 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 23:33:44,822 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-03-10 23:33:45,053 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-10 23:33:45,250 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2021-03-10 23:33:45,710 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-03-10 23:33:46,031 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 23:33:46,534 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:33:47,054 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-10 23:33:47,608 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-10 23:33:47,910 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-03-10 23:33:48,077 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:33:48,298 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 23:33:48,645 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-10 23:33:48,872 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:33:49,394 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:33:49,940 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-03-10 23:33:50,212 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 23:33:50,449 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:33:50,751 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-03-10 23:33:51,136 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:33:51,988 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-10 23:33:52,453 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-03-10 23:33:53,015 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-03-10 23:33:53,692 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 23:33:54,600 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-03-10 23:33:55,111 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-03-10 23:33:55,540 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 23:33:55,872 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-10 23:33:56,247 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:33:57,141 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-03-10 23:33:57,459 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 23:33:58,262 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-10 23:33:58,823 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 23:33:59,625 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-03-10 23:34:00,307 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 23:34:00,867 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 23:34:01,325 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:34:01,930 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-10 23:34:02,234 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:34:02,702 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-03-10 23:34:03,379 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-03-10 23:34:04,032 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-03-10 23:34:04,758 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-03-10 23:34:05,122 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-03-10 23:34:05,593 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 23:34:05,954 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-10 23:34:06,619 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-10 23:34:07,092 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:34:07,809 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-03-10 23:34:09,131 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-10 23:34:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:34:09,317 INFO L93 Difference]: Finished difference Result 7133 states and 22115 transitions. [2021-03-10 23:34:09,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-03-10 23:34:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:34:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:34:09,333 INFO L225 Difference]: With dead ends: 7133 [2021-03-10 23:34:09,333 INFO L226 Difference]: Without dead ends: 7069 [2021-03-10 23:34:09,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4990 ImplicationChecksByTransitivity, 27185.5ms TimeCoverageRelationStatistics Valid=2144, Invalid=12136, Unknown=0, NotChecked=0, Total=14280 [2021-03-10 23:34:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2021-03-10 23:34:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 3425. [2021-03-10 23:34:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 3424 states have (on average 3.300233644859813) internal successors, (11300), 3424 states have internal predecessors, (11300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 11300 transitions. [2021-03-10 23:34:09,406 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 11300 transitions. Word has length 30 [2021-03-10 23:34:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:34:09,407 INFO L480 AbstractCegarLoop]: Abstraction has 3425 states and 11300 transitions. [2021-03-10 23:34:09,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:09,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 11300 transitions. [2021-03-10 23:34:09,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:34:09,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:34:09,411 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:34:09,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-03-10 23:34:09,612 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:34:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:34:09,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1431658549, now seen corresponding path program 31 times [2021-03-10 23:34:09,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:34:09,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768741332] [2021-03-10 23:34:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:34:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:34:10,060 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:34:10,249 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:34:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768741332] [2021-03-10 23:34:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473569656] [2021-03-10 23:34:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:34:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:34:10,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:34:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:34:11,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:11,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:11,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:11,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-03-10 23:34:11,112 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:34:11,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:11,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:11,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:11,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-03-10 23:34:11,268 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:34:11,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:11,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:11,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 49 [2021-03-10 23:34:11,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:34:11,550 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:34:11,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:11,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:34:11,581 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-03-10 23:34:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:11,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:34:11,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:34:11,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714064798] [2021-03-10 23:34:11,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:34:11,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:34:11,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:34:11,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:34:11,831 INFO L87 Difference]: Start difference. First operand 3425 states and 11300 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:12,144 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 23:34:12,399 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 18 [2021-03-10 23:34:13,011 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-03-10 23:34:13,243 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 23:34:13,683 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-03-10 23:34:14,185 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-10 23:34:14,485 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:34:15,455 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-10 23:34:15,633 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 23:34:15,835 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 23:34:16,162 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 23:34:16,533 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 23:34:17,046 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-10 23:34:17,539 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-10 23:34:17,775 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-03-10 23:34:18,754 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:34:19,136 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:34:19,912 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 23:34:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:34:21,325 INFO L93 Difference]: Finished difference Result 4665 states and 15158 transitions. [2021-03-10 23:34:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:34:21,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:34:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:34:21,337 INFO L225 Difference]: With dead ends: 4665 [2021-03-10 23:34:21,337 INFO L226 Difference]: Without dead ends: 4640 [2021-03-10 23:34:21,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 7135.5ms TimeCoverageRelationStatistics Valid=517, Invalid=3143, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:34:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4640 states. [2021-03-10 23:34:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4640 to 3433. [2021-03-10 23:34:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 3.2995337995337994) internal successors, (11324), 3432 states have internal predecessors, (11324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 11324 transitions. [2021-03-10 23:34:21,391 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 11324 transitions. Word has length 30 [2021-03-10 23:34:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:34:21,391 INFO L480 AbstractCegarLoop]: Abstraction has 3433 states and 11324 transitions. [2021-03-10 23:34:21,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 11324 transitions. [2021-03-10 23:34:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:34:21,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:34:21,396 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:34:21,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1338,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:34:21,596 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:34:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:34:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash -218609887, now seen corresponding path program 32 times [2021-03-10 23:34:21,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:34:21,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563387194] [2021-03-10 23:34:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:34:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:34:22,068 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:34:22,291 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:34:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:22,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563387194] [2021-03-10 23:34:22,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476413437] [2021-03-10 23:34:22,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:34:22,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:34:22,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:34:22,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:34:22,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:34:23,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:23,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-03-10 23:34:23,421 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:34:23,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:23,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:23,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-03-10 23:34:23,659 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:34:23,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:23,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:34:23,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:34:24,077 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:34:24,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:24,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:34:24,209 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:216 [2021-03-10 23:34:24,504 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-10 23:34:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:24,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:34:24,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 23:34:24,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094864629] [2021-03-10 23:34:24,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:34:24,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:34:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:34:24,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:34:24,825 INFO L87 Difference]: Start difference. First operand 3433 states and 11324 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:25,315 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-03-10 23:34:25,495 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-03-10 23:34:26,081 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-03-10 23:34:26,348 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-03-10 23:34:26,593 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-10 23:34:27,095 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-10 23:34:27,698 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-03-10 23:34:27,891 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:34:30,524 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-03-10 23:34:30,767 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:34:31,038 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-10 23:34:31,446 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:34:31,978 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-10 23:34:32,243 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:34:32,968 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-03-10 23:34:33,408 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 23:34:33,897 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 23:34:34,182 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:34:34,647 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-03-10 23:34:35,212 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 23:34:35,496 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:34:39,754 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-03-10 23:34:40,031 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 23:34:40,734 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:34:42,992 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-10 23:34:43,308 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-03-10 23:34:43,704 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-03-10 23:34:44,207 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-03-10 23:34:44,507 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-10 23:34:44,801 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 23:34:45,190 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-10 23:34:45,967 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:34:46,325 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:34:46,708 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:34:47,312 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:34:47,769 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:34:48,169 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 23:34:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:34:48,628 INFO L93 Difference]: Finished difference Result 5323 states and 17073 transitions. [2021-03-10 23:34:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 23:34:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:34:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:34:48,640 INFO L225 Difference]: With dead ends: 5323 [2021-03-10 23:34:48,641 INFO L226 Difference]: Without dead ends: 5269 [2021-03-10 23:34:48,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 13369.8ms TimeCoverageRelationStatistics Valid=815, Invalid=5037, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 23:34:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5269 states. [2021-03-10 23:34:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5269 to 3461. [2021-03-10 23:34:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 3460 states have (on average 3.302890173410405) internal successors, (11428), 3460 states have internal predecessors, (11428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 11428 transitions. [2021-03-10 23:34:48,704 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 11428 transitions. Word has length 30 [2021-03-10 23:34:48,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:34:48,704 INFO L480 AbstractCegarLoop]: Abstraction has 3461 states and 11428 transitions. [2021-03-10 23:34:48,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:48,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 11428 transitions. [2021-03-10 23:34:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:34:48,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:34:48,709 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:34:48,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-03-10 23:34:48,909 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:34:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:34:48,910 INFO L82 PathProgramCache]: Analyzing trace with hash -161904655, now seen corresponding path program 33 times [2021-03-10 23:34:48,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:34:48,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795028806] [2021-03-10 23:34:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:34:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:34:49,212 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 23:34:49,479 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:34:49,733 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:34:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:50,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795028806] [2021-03-10 23:34:50,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770268509] [2021-03-10 23:34:50,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:34:50,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:34:50,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:34:50,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 23:34:50,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:34:50,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:50,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:50,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:50,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 55 [2021-03-10 23:34:51,110 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:34:51,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:51,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:51,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:51,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-03-10 23:34:51,422 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:34:51,538 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:34:51,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:51,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:51,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-03-10 23:34:51,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:34:51,933 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 23:34:51,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:52,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:34:52,107 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:63, output treesize:183 [2021-03-10 23:34:52,355 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:34:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:52,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:34:52,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 25 [2021-03-10 23:34:52,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683838458] [2021-03-10 23:34:52,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:34:52,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:34:52,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:34:52,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:34:52,754 INFO L87 Difference]: Start difference. First operand 3461 states and 11428 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:53,226 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-10 23:34:53,810 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 23:34:54,386 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-03-10 23:34:54,877 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-03-10 23:34:55,668 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-10 23:34:56,444 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 23:34:57,336 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 23:34:57,745 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:34:57,979 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:34:58,256 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:34:58,472 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:34:59,012 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-10 23:34:59,379 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 23:35:00,122 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-03-10 23:35:00,455 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-03-10 23:35:00,968 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 23:35:02,530 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2021-03-10 23:35:03,784 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2021-03-10 23:35:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:35:04,317 INFO L93 Difference]: Finished difference Result 5497 states and 17698 transitions. [2021-03-10 23:35:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:35:04,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:35:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:35:04,332 INFO L225 Difference]: With dead ends: 5497 [2021-03-10 23:35:04,332 INFO L226 Difference]: Without dead ends: 5447 [2021-03-10 23:35:04,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 8585.2ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:35:04,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2021-03-10 23:35:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 3421. [2021-03-10 23:35:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3420 states have (on average 3.2976608187134504) internal successors, (11278), 3420 states have internal predecessors, (11278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 11278 transitions. [2021-03-10 23:35:04,408 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 11278 transitions. Word has length 30 [2021-03-10 23:35:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:35:04,408 INFO L480 AbstractCegarLoop]: Abstraction has 3421 states and 11278 transitions. [2021-03-10 23:35:04,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 11278 transitions. [2021-03-10 23:35:04,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:35:04,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:35:04,413 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:35:04,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1406,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:35:04,614 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:35:04,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:35:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash -774232020, now seen corresponding path program 51 times [2021-03-10 23:35:04,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:35:04,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504712756] [2021-03-10 23:35:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:35:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:35:05,102 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 23:35:05,397 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:35:05,651 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:35:05,879 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:35:06,119 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-03-10 23:35:06,262 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 17 [2021-03-10 23:35:06,423 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:35:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:06,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504712756] [2021-03-10 23:35:06,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9138452] [2021-03-10 23:35:06,648 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 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 [2021-03-10 23:35:06,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:35:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:35:06,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:35:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:35:07,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:07,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:07,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 73 [2021-03-10 23:35:08,376 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:35:08,483 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 23:35:08,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:08,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:08,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 63 [2021-03-10 23:35:09,357 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:35:09,531 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:35:09,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:09,716 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:35:09,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:09,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-03-10 23:35:09,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:35:13,478 WARN L205 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 142 DAG size of output: 125 [2021-03-10 23:35:13,480 INFO L628 ElimStorePlain]: treesize reduction 296, result has 85.0 percent of original size [2021-03-10 23:35:14,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:35:14,370 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:56, output treesize:82 [2021-03-10 23:35:14,757 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:35:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:15,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:35:15,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-03-10 23:35:15,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734323715] [2021-03-10 23:35:15,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:35:15,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:35:15,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:35:15,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:35:15,026 INFO L87 Difference]: Start difference. First operand 3421 states and 11278 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:15,797 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-10 23:35:16,282 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-03-10 23:35:16,464 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-03-10 23:35:16,755 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-03-10 23:35:17,216 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 23:35:17,430 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-10 23:35:17,725 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:35:18,469 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-03-10 23:35:18,817 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:35:19,303 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-10 23:35:19,791 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-03-10 23:35:20,056 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-03-10 23:35:20,516 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-03-10 23:35:20,921 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 23:35:21,320 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-03-10 23:35:21,622 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:35:21,981 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-10 23:35:22,421 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 23:35:22,788 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-10 23:35:23,262 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:35:23,756 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:35:24,503 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 23:35:25,379 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-03-10 23:35:25,814 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 23:35:26,393 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 23:35:26,807 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 23:35:27,278 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-03-10 23:35:27,529 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:35:28,259 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-03-10 23:35:28,652 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-10 23:35:29,440 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 23:35:30,146 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:35:30,500 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-10 23:35:31,037 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-03-10 23:35:31,317 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 23:35:31,769 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-10 23:35:32,042 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:35:32,694 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-10 23:35:33,470 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-03-10 23:35:33,993 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 23:35:35,828 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:35:36,482 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-10 23:35:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:35:37,071 INFO L93 Difference]: Finished difference Result 5076 states and 16113 transitions. [2021-03-10 23:35:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 23:35:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:35:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:35:37,084 INFO L225 Difference]: With dead ends: 5076 [2021-03-10 23:35:37,084 INFO L226 Difference]: Without dead ends: 5028 [2021-03-10 23:35:37,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 18530.9ms TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 23:35:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2021-03-10 23:35:37,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 3432. [2021-03-10 23:35:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3431 states have (on average 3.2955406587000873) internal successors, (11307), 3431 states have internal predecessors, (11307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 11307 transitions. [2021-03-10 23:35:37,137 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 11307 transitions. Word has length 30 [2021-03-10 23:35:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:35:37,137 INFO L480 AbstractCegarLoop]: Abstraction has 3432 states and 11307 transitions. [2021-03-10 23:35:37,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 11307 transitions. [2021-03-10 23:35:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:35:37,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:35:37,142 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:35:37,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1459 [2021-03-10 23:35:37,342 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:35:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:35:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash 496387052, now seen corresponding path program 52 times [2021-03-10 23:35:37,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:35:37,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115796374] [2021-03-10 23:35:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:35:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:35:37,606 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 23:35:37,813 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:35:38,067 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:35:38,324 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:35:38,608 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-03-10 23:35:38,779 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 17 [2021-03-10 23:35:38,963 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:35:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:39,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115796374] [2021-03-10 23:35:39,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466826175] [2021-03-10 23:35:39,178 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 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 [2021-03-10 23:35:39,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:35:39,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:35:39,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:35:39,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:35:49,958 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:35:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:50,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:50,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:50,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:50,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:35:50,039 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:35:50,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:50,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:50,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:50,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:50,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:50,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:35:50,097 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:35:50,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:50,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:50,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:35:50,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:35:50,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:50,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:35:50,223 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:35:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:50,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:35:50,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-03-10 23:35:50,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254640938] [2021-03-10 23:35:50,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:35:50,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:35:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:35:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=385, Unknown=4, NotChecked=0, Total=462 [2021-03-10 23:35:50,367 INFO L87 Difference]: Start difference. First operand 3432 states and 11307 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-03-10 23:35:51,105 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 21 [2021-03-10 23:35:51,333 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:35:51,571 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:35:51,793 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 25 [2021-03-10 23:35:52,069 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 23:35:52,340 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-03-10 23:35:52,645 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:35:52,922 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-03-10 23:35:53,275 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:35:53,652 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:35:53,872 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 23:35:54,245 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:35:54,533 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:35:54,818 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:35:55,191 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 23:35:55,441 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:35:55,708 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:35:56,054 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:35:56,290 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:35:56,746 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-03-10 23:36:01,088 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-03-10 23:36:05,623 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-03-10 23:36:05,956 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2021-03-10 23:36:07,150 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-10 23:36:07,412 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:36:07,753 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-10 23:36:08,139 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:36:10,614 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 23:36:10,986 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:36:11,319 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-10 23:36:11,664 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 23:36:11,961 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 23:36:16,676 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-03-10 23:36:20,990 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:36:25,365 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 23:36:26,249 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-03-10 23:36:26,770 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 23:36:31,474 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-03-10 23:36:34,005 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 23:36:38,203 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 23:36:38,592 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 23:36:40,955 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:36:47,382 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 23:37:08,647 WARN L205 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-10 23:37:17,251 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:37:25,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:25,637 INFO L93 Difference]: Finished difference Result 4675 states and 15083 transitions. [2021-03-10 23:37:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 23:37:25,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:37:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:25,650 INFO L225 Difference]: With dead ends: 4675 [2021-03-10 23:37:25,650 INFO L226 Difference]: Without dead ends: 4653 [2021-03-10 23:37:25,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 63205.0ms TimeCoverageRelationStatistics Valid=952, Invalid=5669, Unknown=21, NotChecked=0, Total=6642 [2021-03-10 23:37:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4653 states. [2021-03-10 23:37:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4653 to 3436. [2021-03-10 23:37:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 3.2946142649199417) internal successors, (11317), 3435 states have internal predecessors, (11317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 11317 transitions. [2021-03-10 23:37:25,699 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 11317 transitions. Word has length 30 [2021-03-10 23:37:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:25,699 INFO L480 AbstractCegarLoop]: Abstraction has 3436 states and 11317 transitions. [2021-03-10 23:37:25,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-03-10 23:37:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 11317 transitions. [2021-03-10 23:37:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:37:25,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:25,704 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:25,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1789,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:25,904 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1999576916, now seen corresponding path program 53 times [2021-03-10 23:37:25,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:25,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121216535] [2021-03-10 23:37:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:26,228 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 23:37:26,385 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:37:26,560 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:37:26,719 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:37:26,929 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 23:37:27,179 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-10 23:37:27,449 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 23:37:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:27,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121216535] [2021-03-10 23:37:27,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186320714] [2021-03-10 23:37:27,952 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 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 [2021-03-10 23:37:27,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:37:27,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:27,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:37:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:33,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:33,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:33,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-03-10 23:37:33,605 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:33,730 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:37:33,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:33,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:33,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:33,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:33,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:33,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-03-10 23:37:34,379 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:34,554 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:37:34,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:34,789 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:37:34,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:34,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-03-10 23:37:34,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:37:37,972 WARN L205 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 136 DAG size of output: 130 [2021-03-10 23:37:37,973 INFO L628 ElimStorePlain]: treesize reduction 160, result has 91.1 percent of original size [2021-03-10 23:37:39,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:39,315 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:60, output treesize:289 [2021-03-10 23:37:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:39,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:39,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-03-10 23:37:39,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159410789] [2021-03-10 23:37:39,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:37:39,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:39,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:37:39,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=505, Unknown=2, NotChecked=0, Total=600 [2021-03-10 23:37:39,832 INFO L87 Difference]: Start difference. First operand 3436 states and 11317 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:40,163 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:37:40,354 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:37:40,874 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 23:37:43,360 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-10 23:37:43,637 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:37:46,089 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-10 23:37:46,462 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-03-10 23:37:53,636 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-10 23:37:53,995 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:37:56,639 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-10 23:38:03,262 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 23:38:06,132 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:38:08,577 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:38:11,506 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-10 23:38:22,166 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 23:38:39,538 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 23:38:54,757 WARN L205 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-03-10 23:38:55,357 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-10 23:38:55,969 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 23:39:04,438 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-03-10 23:39:05,095 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:39:05,651 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 23:39:08,735 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-03-10 23:39:17,409 WARN L205 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-10 23:39:22,592 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 23:39:23,354 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 23:39:23,842 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 23:39:24,436 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:39:25,139 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-10 23:39:29,543 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:39:30,428 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:39:30,620 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:39:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:31,080 INFO L93 Difference]: Finished difference Result 5999 states and 19213 transitions. [2021-03-10 23:39:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 23:39:31,084 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:31,094 INFO L225 Difference]: With dead ends: 5999 [2021-03-10 23:39:31,094 INFO L226 Difference]: Without dead ends: 5937 [2021-03-10 23:39:31,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 38896.2ms TimeCoverageRelationStatistics Valid=837, Invalid=5164, Unknown=5, NotChecked=0, Total=6006 [2021-03-10 23:39:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5937 states. [2021-03-10 23:39:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5937 to 3475. [2021-03-10 23:39:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3475 states, 3474 states have (on average 3.3045480713874498) internal successors, (11480), 3474 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3475 states to 3475 states and 11480 transitions. [2021-03-10 23:39:31,156 INFO L78 Accepts]: Start accepts. Automaton has 3475 states and 11480 transitions. Word has length 30 [2021-03-10 23:39:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:31,156 INFO L480 AbstractCegarLoop]: Abstraction has 3475 states and 11480 transitions. [2021-03-10 23:39:31,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3475 states and 11480 transitions. [2021-03-10 23:39:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:31,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:31,160 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:31,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1790,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:31,375 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:31,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:31,375 INFO L82 PathProgramCache]: Analyzing trace with hash 418668730, now seen corresponding path program 54 times [2021-03-10 23:39:31,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:31,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384910344] [2021-03-10 23:39:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:31,811 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 23:39:32,018 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:39:32,245 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:39:32,478 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:39:32,705 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:39:32,933 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:39:33,088 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:39:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384910344] [2021-03-10 23:39:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003880705] [2021-03-10 23:39:33,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:33,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:39:33,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:33,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:39:33,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:34,474 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 23:39:34,475 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-03-10 23:39:34,475 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 217 [2021-03-10 23:39:34,727 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:39:34,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:34,939 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 23:39:34,940 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-03-10 23:39:34,940 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 221 treesize of output 195 [2021-03-10 23:39:35,556 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:39:35,680 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:39:35,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:35,796 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:39:35,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:35,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 193 treesize of output 177 [2021-03-10 23:39:35,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:40,664 WARN L205 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 124 DAG size of output: 105 [2021-03-10 23:39:40,666 INFO L628 ElimStorePlain]: treesize reduction 462, result has 77.3 percent of original size [2021-03-10 23:39:41,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:41,150 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:237, output treesize:28 [2021-03-10 23:39:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:41,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:41,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-03-10 23:39:41,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059242247] [2021-03-10 23:39:41,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:39:41,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:41,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:39:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:39:41,528 INFO L87 Difference]: Start difference. First operand 3475 states and 11480 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:42,159 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 19 [2021-03-10 23:39:42,405 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-10 23:39:42,743 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 22 [2021-03-10 23:39:43,064 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 23:39:43,274 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-03-10 23:39:43,527 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 23:39:43,782 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-03-10 23:39:44,155 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-03-10 23:39:44,556 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 23:39:44,721 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:39:45,040 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-03-10 23:39:45,297 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 23:39:45,483 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-03-10 23:39:45,898 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-10 23:39:46,320 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:39:46,838 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:39:47,475 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-03-10 23:39:47,780 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-10 23:39:48,054 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-10 23:39:48,577 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-10 23:39:48,994 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2021-03-10 23:39:49,264 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 23:39:49,590 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-03-10 23:39:49,905 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:39:50,722 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-03-10 23:39:51,399 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:39:51,604 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:39:51,883 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-03-10 23:39:52,337 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:39:52,680 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-10 23:39:53,064 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-03-10 23:39:53,442 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:39:53,869 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:39:54,411 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:39:54,757 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:39:55,516 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-03-10 23:39:55,820 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-10 23:39:56,159 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:39:56,557 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-10 23:39:56,948 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 23:39:57,318 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:39:57,820 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:39:58,102 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:39:58,528 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-10 23:39:59,048 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-03-10 23:39:59,408 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 23:39:59,809 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-03-10 23:40:00,397 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-03-10 23:40:00,717 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:40:01,281 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 23:40:01,623 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 23:40:02,189 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-10 23:40:02,528 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 23:40:03,072 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-03-10 23:40:03,889 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-03-10 23:40:04,258 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:40:04,707 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 23:40:04,973 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-03-10 23:40:05,308 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-03-10 23:40:05,782 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-10 23:40:06,443 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-03-10 23:40:07,009 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-03-10 23:40:07,581 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-03-10 23:40:07,869 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:40:08,399 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-10 23:40:08,852 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-03-10 23:40:09,192 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-10 23:40:10,034 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 23:40:10,529 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 23:40:11,429 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 23:40:12,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:12,114 INFO L93 Difference]: Finished difference Result 5396 states and 17051 transitions. [2021-03-10 23:40:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-03-10 23:40:12,118 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:12,127 INFO L225 Difference]: With dead ends: 5396 [2021-03-10 23:40:12,127 INFO L226 Difference]: Without dead ends: 5374 [2021-03-10 23:40:12,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4271 ImplicationChecksByTransitivity, 26359.0ms TimeCoverageRelationStatistics Valid=1525, Invalid=10907, Unknown=0, NotChecked=0, Total=12432 [2021-03-10 23:40:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2021-03-10 23:40:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 3492. [2021-03-10 23:40:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 3.3102262961902036) internal successors, (11556), 3491 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 11556 transitions. [2021-03-10 23:40:12,180 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 11556 transitions. Word has length 30 [2021-03-10 23:40:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:12,180 INFO L480 AbstractCegarLoop]: Abstraction has 3492 states and 11556 transitions. [2021-03-10 23:40:12,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 11556 transitions. [2021-03-10 23:40:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:12,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:12,185 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:12,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1925,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:12,385 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:12,385 INFO L82 PathProgramCache]: Analyzing trace with hash 907189418, now seen corresponding path program 55 times [2021-03-10 23:40:12,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:12,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778752664] [2021-03-10 23:40:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:12,747 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 23:40:12,893 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:40:13,066 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:40:13,208 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:40:13,363 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:40:13,610 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 23:40:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:14,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778752664] [2021-03-10 23:40:14,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911471059] [2021-03-10 23:40:14,103 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 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 [2021-03-10 23:40:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:14,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:40:14,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:15,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:15,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:15,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:15,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:15,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-03-10 23:40:15,260 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:15,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:15,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:15,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:15,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:15,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:15,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-03-10 23:40:15,321 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:15,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:15,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:15,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-03-10 23:40:15,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:15,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:15,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:15,454 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-03-10 23:40:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:15,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:15,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-03-10 23:40:15,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991581905] [2021-03-10 23:40:15,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:40:15,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:15,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:40:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:40:15,597 INFO L87 Difference]: Start difference. First operand 3492 states and 11556 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:15,916 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:40:16,172 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-10 23:40:17,011 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 23:40:17,518 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-10 23:40:18,827 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 23:40:19,924 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:40:20,284 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-10 23:40:20,571 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:40:21,244 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 23:40:21,982 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 23:40:22,435 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-10 23:40:24,647 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:40:26,044 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 23:40:26,464 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 23:40:26,905 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 23:40:28,144 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 23:40:28,440 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-10 23:40:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:29,838 INFO L93 Difference]: Finished difference Result 5907 states and 18737 transitions. [2021-03-10 23:40:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:40:29,842 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:29,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:29,851 INFO L225 Difference]: With dead ends: 5907 [2021-03-10 23:40:29,851 INFO L226 Difference]: Without dead ends: 5886 [2021-03-10 23:40:29,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 9799.6ms TimeCoverageRelationStatistics Valid=578, Invalid=3844, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:40:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-03-10 23:40:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 3579. [2021-03-10 23:40:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3579 states, 3578 states have (on average 3.310229178311906) internal successors, (11844), 3578 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 11844 transitions. [2021-03-10 23:40:29,906 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 11844 transitions. Word has length 30 [2021-03-10 23:40:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:29,906 INFO L480 AbstractCegarLoop]: Abstraction has 3579 states and 11844 transitions. [2021-03-10 23:40:29,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 11844 transitions. [2021-03-10 23:40:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:29,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:29,910 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:30,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2097,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:30,111 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:30,111 INFO L82 PathProgramCache]: Analyzing trace with hash 623817692, now seen corresponding path program 56 times [2021-03-10 23:40:30,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:30,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378657534] [2021-03-10 23:40:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:30,455 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 23:40:30,624 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:40:30,801 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:40:30,933 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:40:31,073 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:40:31,256 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 23:40:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:31,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378657534] [2021-03-10 23:40:31,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131903736] [2021-03-10 23:40:31,696 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 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 [2021-03-10 23:40:31,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:40:31,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:40:31,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:32,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:32,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:32,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 73 [2021-03-10 23:40:33,039 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:33,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:33,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:33,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:33,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:33,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:33,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 61 [2021-03-10 23:40:33,655 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:33,815 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:40:33,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:34,042 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:40:34,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:34,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 85 [2021-03-10 23:40:34,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:40:37,609 WARN L205 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 142 DAG size of output: 120 [2021-03-10 23:40:37,611 INFO L628 ElimStorePlain]: treesize reduction 846, result has 60.9 percent of original size [2021-03-10 23:40:37,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:37,937 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:64, output treesize:39 [2021-03-10 23:40:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:38,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:38,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-03-10 23:40:38,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782349121] [2021-03-10 23:40:38,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:40:38,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:38,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:40:38,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:40:38,271 INFO L87 Difference]: Start difference. First operand 3579 states and 11844 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:38,591 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 23:40:38,862 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-10 23:40:39,158 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2021-03-10 23:40:39,613 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-03-10 23:40:40,233 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 23:40:40,507 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-10 23:40:40,948 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-10 23:40:41,312 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 23:40:41,985 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-10 23:40:42,401 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 23:40:42,719 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 23:40:43,269 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-10 23:40:43,826 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 23:40:44,340 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-10 23:40:45,045 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-03-10 23:40:45,656 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-10 23:40:46,127 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-03-10 23:40:46,552 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-03-10 23:40:46,806 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:40:47,167 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 23:40:47,446 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-10 23:40:47,970 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-03-10 23:40:48,505 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 23:40:48,840 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-10 23:40:49,050 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:40:49,262 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 23:40:49,697 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:40:50,048 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 23:40:50,792 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 23:40:51,259 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:40:51,737 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 23:40:52,345 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 23:40:52,756 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 23:40:53,309 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-03-10 23:40:53,808 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 23:40:54,069 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 23:40:54,377 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 23:40:54,874 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-10 23:40:55,158 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 23:40:55,681 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-10 23:40:56,076 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-10 23:40:56,377 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:40:56,744 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 23:40:57,063 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 23:40:57,924 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-10 23:40:58,160 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:40:58,611 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:40:59,064 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-10 23:40:59,562 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-10 23:41:00,127 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 23:41:00,579 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 23:41:01,074 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-10 23:41:01,387 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 23:41:01,888 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-10 23:41:02,301 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-03-10 23:41:02,567 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-10 23:41:02,837 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 23:41:02,985 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:41:03,423 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-10 23:41:03,708 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 23:41:04,489 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:41:05,030 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:41:05,239 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 23:41:05,510 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 23:41:05,759 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 23:41:06,103 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 23:41:06,295 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 23:41:06,749 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 23:41:07,210 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-10 23:41:07,807 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-03-10 23:41:08,136 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-10 23:41:08,382 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 23:41:08,665 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 23:41:09,179 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 23:41:09,528 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-10 23:41:09,940 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-03-10 23:41:10,396 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-10 23:41:10,721 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 23:41:11,234 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-03-10 23:41:11,565 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 23:41:11,969 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:41:12,354 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 23:41:12,616 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:41:12,908 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:41:14,075 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 23:41:14,443 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:41:14,721 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 23:41:15,103 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-10 23:41:15,445 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-03-10 23:41:15,738 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 23:41:16,159 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-10 23:41:16,550 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-10 23:41:17,139 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-03-10 23:41:17,860 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 23:41:18,311 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-10 23:41:18,805 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 23:41:19,459 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 23:41:19,784 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:41:20,113 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:41:20,393 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:41:20,733 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:41:21,126 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:41:21,459 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 23:41:22,094 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-03-10 23:41:22,808 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-03-10 23:41:23,138 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-03-10 23:41:23,514 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-03-10 23:41:25,510 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2021-03-10 23:41:26,780 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-03-10 23:41:27,229 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-03-10 23:41:28,313 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:41:28,870 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 23:41:29,100 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:41:29,572 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 Received shutdown request... [2021-03-10 23:41:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-03-10 23:41:30,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:30,003 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:41:30,006 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:41:30,006 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:41:30 BasicIcfg [2021-03-10 23:41:30,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:41:30,007 INFO L168 Benchmark]: Toolchain (without parser) took 844516.98 ms. Allocated memory was 255.9 MB in the beginning and 685.8 MB in the end (delta: 429.9 MB). Free memory was 236.5 MB in the beginning and 601.8 MB in the end (delta: -365.4 MB). Peak memory consumption was 65.7 MB. Max. memory is 16.0 GB. [2021-03-10 23:41:30,007 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 185.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:41:30,007 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.38 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:41:30,007 INFO L168 Benchmark]: Boogie Preprocessor took 11.01 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.4 MB in the end (delta: 907.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:41:30,007 INFO L168 Benchmark]: RCFGBuilder took 203.26 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 237.4 MB in the end (delta: -4.1 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.0 GB. [2021-03-10 23:41:30,007 INFO L168 Benchmark]: TraceAbstraction took 844277.58 ms. Allocated memory was 255.9 MB in the beginning and 685.8 MB in the end (delta: 429.9 MB). Free memory was 237.4 MB in the beginning and 601.8 MB in the end (delta: -364.4 MB). Peak memory consumption was 67.0 MB. Max. memory is 16.0 GB. [2021-03-10 23:41:30,007 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 185.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.38 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.01 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.4 MB in the end (delta: 907.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 203.26 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 237.4 MB in the end (delta: -4.1 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 844277.58 ms. Allocated memory was 255.9 MB in the beginning and 685.8 MB in the end (delta: 429.9 MB). Free memory was 237.4 MB in the beginning and 601.8 MB in the end (delta: -364.4 MB). Peak memory consumption was 67.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 61). Cancelled while BasicCegarLoop was constructing difference of abstraction (3579states) and FLOYD_HOARE automaton (currently 168 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (3167 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 844205.1ms, OverallIterations: 92, TraceHistogramMax: 2, EmptinessCheckTime: 304.8ms, AutomataDifference: 667015.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 47.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4617 SDtfs, 25666 SDslu, 43056 SDs, 0 SdLazy, 92634 SolverSat, 6378 SolverUnsat, 99 SolverUnknown, 0 SolverNotchecked, 242765.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6327 GetRequests, 1914 SyntacticMatches, 115 SemanticMatches, 4298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88330 ImplicationChecksByTransitivity, 434142.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3579occurred in iteration=91, InterpolantAutomatonStates: 3256, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3854.0ms AutomataMinimizationTime, 91 MinimizatonAttempts, 134429 StatesRemovedByMinimization, 91 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 311.7ms SsaConstructionTime, 888.0ms SatisfiabilityAnalysisTime, 151803.1ms InterpolantComputationTime, 5136 NumberOfCodeBlocks, 5136 NumberOfCodeBlocksAsserted, 290 NumberOfCheckSat, 4955 ConstructedInterpolants, 49 QuantifiedInterpolants, 95987 SizeOfPredicates, 613 NumberOfNonLiveVariables, 5654 ConjunctsInSsa, 1568 ConjunctsInUnsatCore, 181 InterpolantComputations, 3 PerfectInterpolantSequences, 135/1232 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