/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:19:03,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:19:03,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:19:03,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:19:03,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:19:03,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:19:03,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:19:03,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:19:03,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:19:03,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:19:03,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:19:03,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:19:03,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:19:03,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:19:03,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:19:03,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:19:03,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 20:19:03,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:19:03,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:19:03,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:19:03,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:19:03,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:19:03,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:19:03,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:19:03,204 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:19:03,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:19:03,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:19:03,206 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:19:03,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:19:03,206 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:19:03,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:19:03,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:19:03,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:19:03,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:19:03,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:19:03,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:19:03,208 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:19:03,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:19:03,208 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:19:03,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:19:03,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:19:03,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:19:03,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:19:03,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:19:03,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:19:03,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:19:03,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:19:03,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:19:03,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:19:03,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:19:03,209 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:19:03,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:19:03,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:19:03,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:19:03,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:19:03,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:19:03,487 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:19:03,488 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:19:03,488 INFO L432 ainManager$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 [2021-07-13 20:19:03,489 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' [2021-07-13 20:19:03,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:19:03,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:19:03,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:19:03,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:19:03,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:19:03,523 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 13.07 08:19:03" (1/1) ... [2021-07-13 20:19:03,528 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 13.07 08:19:03" (1/1) ... [2021-07-13 20:19:03,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:19:03,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:19:03,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:19:03,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:19:03,541 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 13.07 08:19:03" (1/1) ... [2021-07-13 20:19:03,541 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 13.07 08:19:03" (1/1) ... [2021-07-13 20:19:03,543 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 13.07 08:19:03" (1/1) ... [2021-07-13 20:19:03,543 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 13.07 08:19:03" (1/1) ... [2021-07-13 20:19:03,546 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 13.07 08:19:03" (1/1) ... [2021-07-13 20:19:03,550 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 13.07 08:19:03" (1/1) ... [2021-07-13 20:19:03,550 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 13.07 08:19:03" (1/1) ... [2021-07-13 20:19:03,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:19:03,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:19:03,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:19:03,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:19:03,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:19:03,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:19:03,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:19:03,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:19:03,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:19:03,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:19:03,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:19:03,621 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:19:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:19:03,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:19:03,621 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:19:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:19:03,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:19:03,622 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:19:03,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:19:03,799 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:19:03,800 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:19:03 BoogieIcfgContainer [2021-07-13 20:19:03,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:19:03,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:19:03,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:19:03,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:19:03,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:03" (1/2) ... [2021-07-13 20:19:03,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7969e5 and model type dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:19:03, skipping insertion in model container [2021-07-13 20:19:03,804 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 13.07 08:19:03" (2/2) ... [2021-07-13 20:19:03,805 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-alt.wvr.bpl [2021-07-13 20:19:03,825 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:19:03,825 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:19:03,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:19:03,826 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:19:03,886 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:19:03,918 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:19:03,945 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:19:03,945 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:19:03,945 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:19:03,945 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:19:03,945 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:19:03,945 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:19:03,945 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:19:03,945 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:19:03,956 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-07-13 20:19:03,988 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:19:04,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:04,003 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:04,003 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:04,008 INFO L82 PathProgramCache]: Analyzing trace with hash 761048342, now seen corresponding path program 1 times [2021-07-13 20:19:04,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:04,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832824865] [2021-07-13 20:19:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:04,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:04,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832824865] [2021-07-13 20:19:04,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832824865] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:19:04,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:19:04,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:19:04,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574576747] [2021-07-13 20:19:04,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:19:04,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:19:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:19:04,162 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:04,185 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-07-13 20:19:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:19:04,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:19:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:04,194 INFO L225 Difference]: With dead ends: 298 [2021-07-13 20:19:04,195 INFO L226 Difference]: Without dead ends: 283 [2021-07-13 20:19:04,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:19:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-13 20:19:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-07-13 20:19:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-07-13 20:19:04,236 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-07-13 20:19:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:04,237 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-07-13 20:19:04,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-07-13 20:19:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:19:04,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:04,239 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:04,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:19:04,239 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash 995802333, now seen corresponding path program 1 times [2021-07-13 20:19:04,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:04,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519742524] [2021-07-13 20:19:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:04,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:04,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519742524] [2021-07-13 20:19:04,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519742524] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:19:04,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:19:04,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:19:04,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790627049] [2021-07-13 20:19:04,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:19:04,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:04,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:19:04,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:19:04,279 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) [2021-07-13 20:19:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:04,315 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2021-07-13 20:19:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:19:04,321 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 [2021-07-13 20:19:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:04,322 INFO L225 Difference]: With dead ends: 249 [2021-07-13 20:19:04,323 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 20:19:04,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:19:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 20:19:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-07-13 20:19:04,338 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) [2021-07-13 20:19:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2021-07-13 20:19:04,340 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2021-07-13 20:19:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:04,340 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2021-07-13 20:19:04,340 INFO L483 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) [2021-07-13 20:19:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2021-07-13 20:19:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:19:04,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:04,342 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:04,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:19:04,342 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash 691559827, now seen corresponding path program 1 times [2021-07-13 20:19:04,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:04,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185289004] [2021-07-13 20:19:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:04,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:04,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185289004] [2021-07-13 20:19:04,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185289004] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:19:04,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:19:04,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:19:04,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943930593] [2021-07-13 20:19:04,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:19:04,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:04,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:19:04,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:19:04,393 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) [2021-07-13 20:19:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:04,448 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2021-07-13 20:19:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:19:04,449 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 [2021-07-13 20:19:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:04,452 INFO L225 Difference]: With dead ends: 332 [2021-07-13 20:19:04,452 INFO L226 Difference]: Without dead ends: 332 [2021-07-13 20:19:04,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:19:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-13 20:19:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2021-07-13 20:19:04,466 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) [2021-07-13 20:19:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2021-07-13 20:19:04,468 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2021-07-13 20:19:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:04,468 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2021-07-13 20:19:04,468 INFO L483 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) [2021-07-13 20:19:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2021-07-13 20:19:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:04,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:04,471 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:04,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:19:04,471 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:04,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2040947820, now seen corresponding path program 1 times [2021-07-13 20:19:04,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:04,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586539901] [2021-07-13 20:19:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:04,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586539901] [2021-07-13 20:19:04,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586539901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399371602] [2021-07-13 20:19:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:05,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:05,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:19:05,210 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:05,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:05,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:05,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-13 20:19:05,223 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:05,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:05,230 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 [2021-07-13 20:19:05,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:05,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:05,238 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. [2021-07-13 20:19:05,239 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-07-13 20:19:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:05,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399371602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:05,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:05,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:19:05,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456095269] [2021-07-13 20:19:05,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:19:05,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:05,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:19:05,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:05,282 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:05,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:05,464 INFO L93 Difference]: Finished difference Result 426 states and 1215 transitions. [2021-07-13 20:19:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:19:05,464 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:05,467 INFO L225 Difference]: With dead ends: 426 [2021-07-13 20:19:05,467 INFO L226 Difference]: Without dead ends: 411 [2021-07-13 20:19:05,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-07-13 20:19:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 346. [2021-07-13 20:19:05,476 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) [2021-07-13 20:19:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2021-07-13 20:19:05,482 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2021-07-13 20:19:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:05,482 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2021-07-13 20:19:05,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2021-07-13 20:19:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:05,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:05,483 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:05,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:05,689 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1459009098, now seen corresponding path program 2 times [2021-07-13 20:19:05,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:05,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334781580] [2021-07-13 20:19:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:05,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:05,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334781580] [2021-07-13 20:19:05,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334781580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:05,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746778951] [2021-07-13 20:19:05,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:05,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:05,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:05,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:06,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,108 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 [2021-07-13 20:19:06,146 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:06,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,164 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 19 treesize of output 23 [2021-07-13 20:19:06,197 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:06,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,222 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 15 treesize of output 19 [2021-07-13 20:19:06,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:19:06,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,255 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. [2021-07-13 20:19:06,255 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-07-13 20:19:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746778951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:06,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:19:06,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26190586] [2021-07-13 20:19:06,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:06,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:06,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:06,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:06,306 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) [2021-07-13 20:19:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:06,759 INFO L93 Difference]: Finished difference Result 616 states and 1755 transitions. [2021-07-13 20:19:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:06,759 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 [2021-07-13 20:19:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:06,762 INFO L225 Difference]: With dead ends: 616 [2021-07-13 20:19:06,762 INFO L226 Difference]: Without dead ends: 586 [2021-07-13 20:19:06,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-13 20:19:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 368. [2021-07-13 20:19:06,771 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) [2021-07-13 20:19:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1070 transitions. [2021-07-13 20:19:06,773 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1070 transitions. Word has length 24 [2021-07-13 20:19:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:06,773 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1070 transitions. [2021-07-13 20:19:06,773 INFO L483 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) [2021-07-13 20:19:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1070 transitions. [2021-07-13 20:19:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:06,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:06,774 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:06,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:06,992 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:06,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:06,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1585830426, now seen corresponding path program 3 times [2021-07-13 20:19:06,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:06,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799387672] [2021-07-13 20:19:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:07,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:07,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799387672] [2021-07-13 20:19:07,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799387672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:07,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361337688] [2021-07-13 20:19:07,219 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) [2021-07-13 20:19:07,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:19:07,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:07,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:19:07,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:07,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:07,339 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 [2021-07-13 20:19:07,368 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:07,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:07,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:07,382 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 19 treesize of output 23 [2021-07-13 20:19:07,412 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:07,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:07,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:07,431 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 15 treesize of output 19 [2021-07-13 20:19:07,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:19:07,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:07,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:07,452 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:29, output treesize:15 [2021-07-13 20:19:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:07,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361337688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:07,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:07,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-07-13 20:19:07,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184592784] [2021-07-13 20:19:07,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:07,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:07,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:07,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:07,496 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) [2021-07-13 20:19:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:07,940 INFO L93 Difference]: Finished difference Result 717 states and 2081 transitions. [2021-07-13 20:19:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:19:07,941 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 [2021-07-13 20:19:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:07,944 INFO L225 Difference]: With dead ends: 717 [2021-07-13 20:19:07,944 INFO L226 Difference]: Without dead ends: 702 [2021-07-13 20:19:07,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:19:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-07-13 20:19:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 366. [2021-07-13 20:19:07,953 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) [2021-07-13 20:19:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1071 transitions. [2021-07-13 20:19:07,954 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1071 transitions. Word has length 24 [2021-07-13 20:19:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:07,954 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1071 transitions. [2021-07-13 20:19:07,954 INFO L483 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) [2021-07-13 20:19:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1071 transitions. [2021-07-13 20:19:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:07,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:07,955 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:08,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:19:08,172 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:08,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:08,172 INFO L82 PathProgramCache]: Analyzing trace with hash 416827498, now seen corresponding path program 4 times [2021-07-13 20:19:08,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:08,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615684143] [2021-07-13 20:19:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:08,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615684143] [2021-07-13 20:19:08,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615684143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808272355] [2021-07-13 20:19:08,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:08,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:08,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:08,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:19:08,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:08,390 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 [2021-07-13 20:19:08,392 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:08,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:08,398 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 [2021-07-13 20:19:08,400 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:08,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:08,406 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 [2021-07-13 20:19:08,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:08,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:08,413 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. [2021-07-13 20:19:08,413 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-07-13 20:19:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808272355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:08,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:19:08,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245543152] [2021-07-13 20:19:08,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:08,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:08,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:08,444 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) [2021-07-13 20:19:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:08,626 INFO L93 Difference]: Finished difference Result 558 states and 1607 transitions. [2021-07-13 20:19:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:19:08,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:08,628 INFO L225 Difference]: With dead ends: 558 [2021-07-13 20:19:08,628 INFO L226 Difference]: Without dead ends: 543 [2021-07-13 20:19:08,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-13 20:19:08,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 382. [2021-07-13 20:19:08,636 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) [2021-07-13 20:19:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1111 transitions. [2021-07-13 20:19:08,637 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1111 transitions. Word has length 24 [2021-07-13 20:19:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:08,637 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1111 transitions. [2021-07-13 20:19:08,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:08,637 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1111 transitions. [2021-07-13 20:19:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:08,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:08,638 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:08,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:08,853 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2079136470, now seen corresponding path program 5 times [2021-07-13 20:19:08,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:08,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611160416] [2021-07-13 20:19:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:09,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611160416] [2021-07-13 20:19:09,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611160416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854898978] [2021-07-13 20:19:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:09,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:09,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:09,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:19:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:09,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:09,183 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 [2021-07-13 20:19:09,206 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:09,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:09,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:09,221 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 [2021-07-13 20:19:09,242 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:09,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:09,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:09,265 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 [2021-07-13 20:19:09,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:19:09,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:09,320 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. [2021-07-13 20:19:09,320 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:36, output treesize:45 [2021-07-13 20:19:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:09,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854898978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:09,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:19:09,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332100064] [2021-07-13 20:19:09,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:09,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:09,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:09,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:09,400 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) [2021-07-13 20:19:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:09,724 INFO L93 Difference]: Finished difference Result 681 states and 1985 transitions. [2021-07-13 20:19:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:09,725 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 [2021-07-13 20:19:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:09,728 INFO L225 Difference]: With dead ends: 681 [2021-07-13 20:19:09,728 INFO L226 Difference]: Without dead ends: 666 [2021-07-13 20:19:09,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-13 20:19:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 390. [2021-07-13 20:19:09,736 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) [2021-07-13 20:19:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1143 transitions. [2021-07-13 20:19:09,738 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1143 transitions. Word has length 24 [2021-07-13 20:19:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:09,738 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1143 transitions. [2021-07-13 20:19:09,738 INFO L483 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) [2021-07-13 20:19:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1143 transitions. [2021-07-13 20:19:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:09,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:09,739 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:09,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:19:09,953 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:09,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:09,953 INFO L82 PathProgramCache]: Analyzing trace with hash 430819029, now seen corresponding path program 6 times [2021-07-13 20:19:09,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:09,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96228170] [2021-07-13 20:19:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:09,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:09,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96228170] [2021-07-13 20:19:09,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96228170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821344353] [2021-07-13 20:19:09,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:10,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:19:10,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:10,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:10,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821344353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:10,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:10,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:10,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551465176] [2021-07-13 20:19:10,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:10,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:10,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:10,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:10,094 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) [2021-07-13 20:19:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:10,482 INFO L93 Difference]: Finished difference Result 1186 states and 3456 transitions. [2021-07-13 20:19:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:19:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:10,487 INFO L225 Difference]: With dead ends: 1186 [2021-07-13 20:19:10,487 INFO L226 Difference]: Without dead ends: 1186 [2021-07-13 20:19:10,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:19:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-07-13 20:19:10,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 509. [2021-07-13 20:19:10,499 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) [2021-07-13 20:19:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1559 transitions. [2021-07-13 20:19:10,501 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1559 transitions. Word has length 27 [2021-07-13 20:19:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:10,501 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1559 transitions. [2021-07-13 20:19:10,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1559 transitions. [2021-07-13 20:19:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:10,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:10,502 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:10,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:10,713 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash 919339717, now seen corresponding path program 7 times [2021-07-13 20:19:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:10,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894200472] [2021-07-13 20:19:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:10,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:10,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894200472] [2021-07-13 20:19:10,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894200472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:10,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945151469] [2021-07-13 20:19:10,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945151469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:10,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:10,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109471887] [2021-07-13 20:19:10,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:10,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:10,870 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) [2021-07-13 20:19:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:11,674 INFO L93 Difference]: Finished difference Result 2025 states and 5753 transitions. [2021-07-13 20:19:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:19:11,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:11,683 INFO L225 Difference]: With dead ends: 2025 [2021-07-13 20:19:11,683 INFO L226 Difference]: Without dead ends: 2025 [2021-07-13 20:19:11,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 473.3ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:19:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-07-13 20:19:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 515. [2021-07-13 20:19:11,701 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) [2021-07-13 20:19:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1589 transitions. [2021-07-13 20:19:11,702 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1589 transitions. Word has length 27 [2021-07-13 20:19:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:11,702 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1589 transitions. [2021-07-13 20:19:11,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1589 transitions. [2021-07-13 20:19:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:11,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:11,704 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:11,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:19:11,923 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash 725439049, now seen corresponding path program 8 times [2021-07-13 20:19:11,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:11,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159190873] [2021-07-13 20:19:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:11,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:11,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159190873] [2021-07-13 20:19:11,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159190873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:11,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70071658] [2021-07-13 20:19:11,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:11,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:11,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:12,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70071658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:12,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:12,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:12,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962281019] [2021-07-13 20:19:12,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:12,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:12,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:12,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:12,068 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) [2021-07-13 20:19:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:12,772 INFO L93 Difference]: Finished difference Result 1842 states and 5297 transitions. [2021-07-13 20:19:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:19:12,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:12,779 INFO L225 Difference]: With dead ends: 1842 [2021-07-13 20:19:12,779 INFO L226 Difference]: Without dead ends: 1842 [2021-07-13 20:19:12,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 397.7ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:19:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-07-13 20:19:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 505. [2021-07-13 20:19:12,794 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) [2021-07-13 20:19:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1549 transitions. [2021-07-13 20:19:12,795 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1549 transitions. Word has length 27 [2021-07-13 20:19:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:12,795 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1549 transitions. [2021-07-13 20:19:12,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1549 transitions. [2021-07-13 20:19:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:12,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:12,796 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:13,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:19:13,014 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:13,014 INFO L82 PathProgramCache]: Analyzing trace with hash 682299666, now seen corresponding path program 1 times [2021-07-13 20:19:13,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:13,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040730272] [2021-07-13 20:19:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:13,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:13,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040730272] [2021-07-13 20:19:13,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040730272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823845019] [2021-07-13 20:19:13,046 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 [2021-07-13 20:19:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:13,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:19:13,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:13,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823845019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:13,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:19:13,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276384253] [2021-07-13 20:19:13,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:19:13,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:19:13,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:19:13,118 INFO L87 Difference]: Start difference. First operand 505 states and 1549 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) [2021-07-13 20:19:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:13,225 INFO L93 Difference]: Finished difference Result 1215 states and 3591 transitions. [2021-07-13 20:19:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:13,225 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 [2021-07-13 20:19:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:13,230 INFO L225 Difference]: With dead ends: 1215 [2021-07-13 20:19:13,230 INFO L226 Difference]: Without dead ends: 1209 [2021-07-13 20:19:13,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-07-13 20:19:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 784. [2021-07-13 20:19:13,246 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) [2021-07-13 20:19:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2488 transitions. [2021-07-13 20:19:13,248 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2488 transitions. Word has length 27 [2021-07-13 20:19:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:13,249 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2488 transitions. [2021-07-13 20:19:13,249 INFO L483 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) [2021-07-13 20:19:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2488 transitions. [2021-07-13 20:19:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:13,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:13,250 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:13,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:19:13,467 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:13,468 INFO L82 PathProgramCache]: Analyzing trace with hash -542744963, now seen corresponding path program 9 times [2021-07-13 20:19:13,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:13,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197744882] [2021-07-13 20:19:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:13,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:13,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197744882] [2021-07-13 20:19:13,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197744882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977470995] [2021-07-13 20:19:13,509 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 [2021-07-13 20:19:13,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:19:13,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:13,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:13,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977470995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:13,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:19:13,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512966483] [2021-07-13 20:19:13,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:13,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:13,639 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) [2021-07-13 20:19:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:13,814 INFO L93 Difference]: Finished difference Result 1375 states and 4197 transitions. [2021-07-13 20:19:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:13,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:13,820 INFO L225 Difference]: With dead ends: 1375 [2021-07-13 20:19:13,820 INFO L226 Difference]: Without dead ends: 1327 [2021-07-13 20:19:13,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-07-13 20:19:13,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 987. [2021-07-13 20:19:13,837 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) [2021-07-13 20:19:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3142 transitions. [2021-07-13 20:19:13,840 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3142 transitions. Word has length 27 [2021-07-13 20:19:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:13,840 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 3142 transitions. [2021-07-13 20:19:13,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3142 transitions. [2021-07-13 20:19:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:13,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:13,842 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:14,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:14,056 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:14,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1956507318, now seen corresponding path program 2 times [2021-07-13 20:19:14,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:14,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167492807] [2021-07-13 20:19:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:14,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167492807] [2021-07-13 20:19:14,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167492807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721994280] [2021-07-13 20:19:14,082 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 [2021-07-13 20:19:14,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:19:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:14,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721994280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:14,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:19:14,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34116678] [2021-07-13 20:19:14,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:19:14,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:14,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:19:14,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:19:14,166 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) [2021-07-13 20:19:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:14,273 INFO L93 Difference]: Finished difference Result 1478 states and 4418 transitions. [2021-07-13 20:19:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:14,274 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 [2021-07-13 20:19:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:14,279 INFO L225 Difference]: With dead ends: 1478 [2021-07-13 20:19:14,279 INFO L226 Difference]: Without dead ends: 1478 [2021-07-13 20:19:14,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-07-13 20:19:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2021-07-13 20:19:14,299 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) [2021-07-13 20:19:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3166 transitions. [2021-07-13 20:19:14,302 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3166 transitions. Word has length 27 [2021-07-13 20:19:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:14,302 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3166 transitions. [2021-07-13 20:19:14,302 INFO L483 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) [2021-07-13 20:19:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3166 transitions. [2021-07-13 20:19:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:14,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:14,304 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:14,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:19:14,521 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:14,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2118816535, now seen corresponding path program 10 times [2021-07-13 20:19:14,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:14,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607710320] [2021-07-13 20:19:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:14,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:14,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607710320] [2021-07-13 20:19:14,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607710320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605725116] [2021-07-13 20:19:14,568 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 [2021-07-13 20:19:14,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:14,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:14,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605725116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:14,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:19:14,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136132820] [2021-07-13 20:19:14,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:19:14,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:14,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:19:14,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:19:14,652 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) [2021-07-13 20:19:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:14,945 INFO L93 Difference]: Finished difference Result 2277 states and 6674 transitions. [2021-07-13 20:19:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:19:14,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:14,953 INFO L225 Difference]: With dead ends: 2277 [2021-07-13 20:19:14,953 INFO L226 Difference]: Without dead ends: 2277 [2021-07-13 20:19:14,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-07-13 20:19:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1022. [2021-07-13 20:19:14,977 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) [2021-07-13 20:19:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3214 transitions. [2021-07-13 20:19:14,979 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3214 transitions. Word has length 27 [2021-07-13 20:19:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:14,979 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3214 transitions. [2021-07-13 20:19:14,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3214 transitions. [2021-07-13 20:19:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:14,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:14,981 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:15,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:15,197 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2031092163, now seen corresponding path program 11 times [2021-07-13 20:19:15,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:15,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999598265] [2021-07-13 20:19:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:15,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:15,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999598265] [2021-07-13 20:19:15,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999598265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:15,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774057306] [2021-07-13 20:19:15,227 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 [2021-07-13 20:19:15,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:19:15,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:15,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:15,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:15,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774057306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:15,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:15,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:19:15,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328502130] [2021-07-13 20:19:15,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:19:15,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:19:15,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:19:15,321 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) [2021-07-13 20:19:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:15,781 INFO L93 Difference]: Finished difference Result 2725 states and 7832 transitions. [2021-07-13 20:19:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:19:15,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:15,791 INFO L225 Difference]: With dead ends: 2725 [2021-07-13 20:19:15,791 INFO L226 Difference]: Without dead ends: 2725 [2021-07-13 20:19:15,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:19:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-07-13 20:19:15,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1096. [2021-07-13 20:19:15,817 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) [2021-07-13 20:19:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3439 transitions. [2021-07-13 20:19:15,820 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3439 transitions. Word has length 27 [2021-07-13 20:19:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:15,820 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3439 transitions. [2021-07-13 20:19:15,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3439 transitions. [2021-07-13 20:19:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:15,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:15,822 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:16,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:19:16,033 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1703761887, now seen corresponding path program 12 times [2021-07-13 20:19:16,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:16,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165136618] [2021-07-13 20:19:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:16,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165136618] [2021-07-13 20:19:16,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165136618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778706728] [2021-07-13 20:19:16,064 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 [2021-07-13 20:19:16,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:19:16,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778706728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:16,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:19:16,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175569282] [2021-07-13 20:19:16,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:16,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:16,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:16,181 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) [2021-07-13 20:19:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:16,432 INFO L93 Difference]: Finished difference Result 2457 states and 7416 transitions. [2021-07-13 20:19:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:19:16,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:16,439 INFO L225 Difference]: With dead ends: 2457 [2021-07-13 20:19:16,439 INFO L226 Difference]: Without dead ends: 2447 [2021-07-13 20:19:16,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-07-13 20:19:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1570. [2021-07-13 20:19:16,467 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) [2021-07-13 20:19:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5015 transitions. [2021-07-13 20:19:16,470 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5015 transitions. Word has length 27 [2021-07-13 20:19:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:16,470 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5015 transitions. [2021-07-13 20:19:16,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5015 transitions. [2021-07-13 20:19:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:16,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:16,473 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:16,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:16,685 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1641907719, now seen corresponding path program 13 times [2021-07-13 20:19:16,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:16,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397843335] [2021-07-13 20:19:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:16,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397843335] [2021-07-13 20:19:16,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397843335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372470707] [2021-07-13 20:19:16,715 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 [2021-07-13 20:19:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:16,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372470707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:16,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:19:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372814489] [2021-07-13 20:19:16,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:16,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:16,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:16,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:16,826 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) [2021-07-13 20:19:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:17,097 INFO L93 Difference]: Finished difference Result 2556 states and 7763 transitions. [2021-07-13 20:19:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:19:17,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:17,102 INFO L225 Difference]: With dead ends: 2556 [2021-07-13 20:19:17,102 INFO L226 Difference]: Without dead ends: 2556 [2021-07-13 20:19:17,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:19:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-07-13 20:19:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1576. [2021-07-13 20:19:17,128 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) [2021-07-13 20:19:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5022 transitions. [2021-07-13 20:19:17,131 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5022 transitions. Word has length 27 [2021-07-13 20:19:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:17,131 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5022 transitions. [2021-07-13 20:19:17,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5022 transitions. [2021-07-13 20:19:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:17,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:17,134 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:17,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:19:17,349 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash 481161223, now seen corresponding path program 14 times [2021-07-13 20:19:17,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:17,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826492279] [2021-07-13 20:19:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:17,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826492279] [2021-07-13 20:19:17,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826492279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733190266] [2021-07-13 20:19:17,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:17,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:17,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:17,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:17,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:17,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733190266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:17,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:17,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:19:17,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084655403] [2021-07-13 20:19:17,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:19:17,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:17,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:19:17,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:19:17,469 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) [2021-07-13 20:19:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:17,908 INFO L93 Difference]: Finished difference Result 3074 states and 9276 transitions. [2021-07-13 20:19:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:19:17,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:17,941 INFO L225 Difference]: With dead ends: 3074 [2021-07-13 20:19:17,941 INFO L226 Difference]: Without dead ends: 3070 [2021-07-13 20:19:17,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:19:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-07-13 20:19:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1588. [2021-07-13 20:19:17,984 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) [2021-07-13 20:19:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5044 transitions. [2021-07-13 20:19:18,004 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5044 transitions. Word has length 27 [2021-07-13 20:19:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:18,004 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5044 transitions. [2021-07-13 20:19:18,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5044 transitions. [2021-07-13 20:19:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:18,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:18,006 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:18,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:18,221 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1748600121, now seen corresponding path program 15 times [2021-07-13 20:19:18,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:18,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690891909] [2021-07-13 20:19:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:18,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:18,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690891909] [2021-07-13 20:19:18,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690891909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:18,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103560409] [2021-07-13 20:19:18,265 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 [2021-07-13 20:19:18,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:19:18,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:18,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103560409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:18,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:18,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181415891] [2021-07-13 20:19:18,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:18,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:18,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:18,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:18,420 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) [2021-07-13 20:19:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:19,343 INFO L93 Difference]: Finished difference Result 5541 states and 16712 transitions. [2021-07-13 20:19:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:19:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:19,378 INFO L225 Difference]: With dead ends: 5541 [2021-07-13 20:19:19,378 INFO L226 Difference]: Without dead ends: 5541 [2021-07-13 20:19:19,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:19:19,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-07-13 20:19:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 1799. [2021-07-13 20:19:19,466 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) [2021-07-13 20:19:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5887 transitions. [2021-07-13 20:19:19,470 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5887 transitions. Word has length 27 [2021-07-13 20:19:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:19,470 INFO L482 AbstractCegarLoop]: Abstraction has 1799 states and 5887 transitions. [2021-07-13 20:19:19,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5887 transitions. [2021-07-13 20:19:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:19,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:19,493 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:19,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:19:19,709 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:19,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1942500789, now seen corresponding path program 16 times [2021-07-13 20:19:19,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:19,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067226407] [2021-07-13 20:19:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:19,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:19,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067226407] [2021-07-13 20:19:19,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067226407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:19,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136804762] [2021-07-13 20:19:19,757 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 [2021-07-13 20:19:19,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:19,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:19,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136804762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:19,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:19,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:19,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388125382] [2021-07-13 20:19:19,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:19,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:19,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:19,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:19,936 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) [2021-07-13 20:19:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:20,985 INFO L93 Difference]: Finished difference Result 5525 states and 16688 transitions. [2021-07-13 20:19:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:19:20,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:20,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:21,007 INFO L225 Difference]: With dead ends: 5525 [2021-07-13 20:19:21,007 INFO L226 Difference]: Without dead ends: 5525 [2021-07-13 20:19:21,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 572.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:19:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-07-13 20:19:21,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 1784. [2021-07-13 20:19:21,111 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) [2021-07-13 20:19:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5811 transitions. [2021-07-13 20:19:21,116 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5811 transitions. Word has length 27 [2021-07-13 20:19:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:21,116 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 5811 transitions. [2021-07-13 20:19:21,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5811 transitions. [2021-07-13 20:19:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:21,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:21,120 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:21,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:19:21,336 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1980556741, now seen corresponding path program 17 times [2021-07-13 20:19:21,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:21,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211827572] [2021-07-13 20:19:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:21,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:21,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211827572] [2021-07-13 20:19:21,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211827572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:21,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308887291] [2021-07-13 20:19:21,371 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 [2021-07-13 20:19:21,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:19:21,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:21,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308887291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:21,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:21,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:21,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538615961] [2021-07-13 20:19:21,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:21,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:21,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:21,485 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) [2021-07-13 20:19:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:22,225 INFO L93 Difference]: Finished difference Result 5112 states and 15104 transitions. [2021-07-13 20:19:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:19:22,226 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 [2021-07-13 20:19:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:22,236 INFO L225 Difference]: With dead ends: 5112 [2021-07-13 20:19:22,236 INFO L226 Difference]: Without dead ends: 5112 [2021-07-13 20:19:22,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:19:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-07-13 20:19:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 1804. [2021-07-13 20:19:22,281 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) [2021-07-13 20:19:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5887 transitions. [2021-07-13 20:19:22,290 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5887 transitions. Word has length 27 [2021-07-13 20:19:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:22,290 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5887 transitions. [2021-07-13 20:19:22,290 INFO L483 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) [2021-07-13 20:19:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5887 transitions. [2021-07-13 20:19:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:22,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:22,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:22,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:19:22,513 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1791338443, now seen corresponding path program 18 times [2021-07-13 20:19:22,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:22,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266137297] [2021-07-13 20:19:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:22,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266137297] [2021-07-13 20:19:22,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266137297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:22,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792962256] [2021-07-13 20:19:22,549 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 [2021-07-13 20:19:22,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:22,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:22,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792962256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:22,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:22,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:22,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643546523] [2021-07-13 20:19:22,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:22,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:22,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:22,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:22,659 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) [2021-07-13 20:19:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:23,294 INFO L93 Difference]: Finished difference Result 4837 states and 14460 transitions. [2021-07-13 20:19:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:19:23,294 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 [2021-07-13 20:19:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:23,304 INFO L225 Difference]: With dead ends: 4837 [2021-07-13 20:19:23,304 INFO L226 Difference]: Without dead ends: 4833 [2021-07-13 20:19:23,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:19:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4833 states. [2021-07-13 20:19:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4833 to 1804. [2021-07-13 20:19:23,347 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) [2021-07-13 20:19:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5885 transitions. [2021-07-13 20:19:23,351 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5885 transitions. Word has length 27 [2021-07-13 20:19:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:23,351 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5885 transitions. [2021-07-13 20:19:23,351 INFO L483 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) [2021-07-13 20:19:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5885 transitions. [2021-07-13 20:19:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:23,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:23,354 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:23,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-13 20:19:23,565 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:23,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1114107637, now seen corresponding path program 19 times [2021-07-13 20:19:23,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:23,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381569490] [2021-07-13 20:19:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:23,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:23,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381569490] [2021-07-13 20:19:23,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381569490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:23,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367721163] [2021-07-13 20:19:23,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:23,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367721163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:23,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:23,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:23,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703828743] [2021-07-13 20:19:23,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:23,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:23,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:23,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:23,698 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) [2021-07-13 20:19:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:24,399 INFO L93 Difference]: Finished difference Result 4879 states and 14554 transitions. [2021-07-13 20:19:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:19:24,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:24,408 INFO L225 Difference]: With dead ends: 4879 [2021-07-13 20:19:24,408 INFO L226 Difference]: Without dead ends: 4879 [2021-07-13 20:19:24,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:19:24,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-07-13 20:19:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 1814. [2021-07-13 20:19:24,452 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) [2021-07-13 20:19:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5924 transitions. [2021-07-13 20:19:24,455 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5924 transitions. Word has length 27 [2021-07-13 20:19:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:24,456 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5924 transitions. [2021-07-13 20:19:24,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5924 transitions. [2021-07-13 20:19:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:24,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:24,459 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:24,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:24,673 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:24,673 INFO L82 PathProgramCache]: Analyzing trace with hash 668541833, now seen corresponding path program 20 times [2021-07-13 20:19:24,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:24,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422107205] [2021-07-13 20:19:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:24,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422107205] [2021-07-13 20:19:24,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422107205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685600808] [2021-07-13 20:19:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:24,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:24,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:24,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:24,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:24,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685600808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:24,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:24,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:24,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987669793] [2021-07-13 20:19:24,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:24,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:24,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:24,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:24,808 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) [2021-07-13 20:19:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:25,442 INFO L93 Difference]: Finished difference Result 4586 states and 13852 transitions. [2021-07-13 20:19:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:19:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:25,449 INFO L225 Difference]: With dead ends: 4586 [2021-07-13 20:19:25,449 INFO L226 Difference]: Without dead ends: 4582 [2021-07-13 20:19:25,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:19:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-07-13 20:19:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 1814. [2021-07-13 20:19:25,486 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) [2021-07-13 20:19:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5922 transitions. [2021-07-13 20:19:25,490 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5922 transitions. Word has length 27 [2021-07-13 20:19:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:25,490 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5922 transitions. [2021-07-13 20:19:25,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5922 transitions. [2021-07-13 20:19:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:25,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:25,493 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:25,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:25,709 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash -393874732, now seen corresponding path program 3 times [2021-07-13 20:19:25,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:25,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392575647] [2021-07-13 20:19:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:25,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392575647] [2021-07-13 20:19:25,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392575647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364769532] [2021-07-13 20:19:25,734 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 [2021-07-13 20:19:25,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:19:25,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:25,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:19:25,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:25,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364769532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:25,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:19:25,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586249066] [2021-07-13 20:19:25,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:19:25,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:25,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:19:25,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:19:25,800 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) [2021-07-13 20:19:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:25,881 INFO L93 Difference]: Finished difference Result 1973 states and 6380 transitions. [2021-07-13 20:19:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:19:25,881 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 [2021-07-13 20:19:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:25,884 INFO L225 Difference]: With dead ends: 1973 [2021-07-13 20:19:25,884 INFO L226 Difference]: Without dead ends: 1973 [2021-07-13 20:19:25,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-07-13 20:19:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1690. [2021-07-13 20:19:25,904 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) [2021-07-13 20:19:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 5512 transitions. [2021-07-13 20:19:25,907 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 5512 transitions. Word has length 27 [2021-07-13 20:19:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:25,907 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 5512 transitions. [2021-07-13 20:19:25,907 INFO L483 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) [2021-07-13 20:19:25,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 5512 transitions. [2021-07-13 20:19:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:25,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:25,910 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:26,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 20:19:26,126 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:26,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1713019731, now seen corresponding path program 21 times [2021-07-13 20:19:26,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:26,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599791898] [2021-07-13 20:19:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:26,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:26,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599791898] [2021-07-13 20:19:26,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599791898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:26,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158996012] [2021-07-13 20:19:26,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:26,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:19:26,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:26,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:26,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:26,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158996012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:26,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:26,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:19:26,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358110914] [2021-07-13 20:19:26,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:19:26,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:26,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:19:26,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:19:26,236 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) [2021-07-13 20:19:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:26,553 INFO L93 Difference]: Finished difference Result 3078 states and 9480 transitions. [2021-07-13 20:19:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:19:26,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:26,558 INFO L225 Difference]: With dead ends: 3078 [2021-07-13 20:19:26,558 INFO L226 Difference]: Without dead ends: 3078 [2021-07-13 20:19:26,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:19:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-07-13 20:19:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1814. [2021-07-13 20:19:26,585 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) [2021-07-13 20:19:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5886 transitions. [2021-07-13 20:19:26,588 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5886 transitions. Word has length 27 [2021-07-13 20:19:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:26,589 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5886 transitions. [2021-07-13 20:19:26,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:26,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5886 transitions. [2021-07-13 20:19:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:26,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:26,591 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:26,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:26,801 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1929419657, now seen corresponding path program 22 times [2021-07-13 20:19:26,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:26,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955343366] [2021-07-13 20:19:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:26,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:26,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955343366] [2021-07-13 20:19:26,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955343366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:26,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349245519] [2021-07-13 20:19:26,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:26,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:26,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:26,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:26,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:26,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349245519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:26,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:26,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:19:26,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164050310] [2021-07-13 20:19:26,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:19:26,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:26,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:19:26,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:19:26,895 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) [2021-07-13 20:19:27,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:27,159 INFO L93 Difference]: Finished difference Result 3165 states and 9710 transitions. [2021-07-13 20:19:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:19:27,160 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 [2021-07-13 20:19:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:27,164 INFO L225 Difference]: With dead ends: 3165 [2021-07-13 20:19:27,164 INFO L226 Difference]: Without dead ends: 3165 [2021-07-13 20:19:27,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-07-13 20:19:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1928. [2021-07-13 20:19:27,191 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) [2021-07-13 20:19:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6221 transitions. [2021-07-13 20:19:27,194 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6221 transitions. Word has length 27 [2021-07-13 20:19:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:27,195 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6221 transitions. [2021-07-13 20:19:27,195 INFO L483 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) [2021-07-13 20:19:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6221 transitions. [2021-07-13 20:19:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:27,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:27,198 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:27,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:19:27,404 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:27,405 INFO L82 PathProgramCache]: Analyzing trace with hash 815616699, now seen corresponding path program 23 times [2021-07-13 20:19:27,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:27,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671708256] [2021-07-13 20:19:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:27,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:27,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671708256] [2021-07-13 20:19:27,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671708256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:27,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861512571] [2021-07-13 20:19:27,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:27,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:27,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:27,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:27,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861512571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:27,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:27,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:19:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410861970] [2021-07-13 20:19:27,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:19:27,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:27,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:19:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:19:27,523 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) [2021-07-13 20:19:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:27,752 INFO L93 Difference]: Finished difference Result 3029 states and 9362 transitions. [2021-07-13 20:19:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:19:27,752 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 [2021-07-13 20:19:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:27,757 INFO L225 Difference]: With dead ends: 3029 [2021-07-13 20:19:27,757 INFO L226 Difference]: Without dead ends: 3025 [2021-07-13 20:19:27,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-07-13 20:19:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 1928. [2021-07-13 20:19:27,787 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) [2021-07-13 20:19:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6219 transitions. [2021-07-13 20:19:27,791 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6219 transitions. Word has length 27 [2021-07-13 20:19:27,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:27,791 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6219 transitions. [2021-07-13 20:19:27,791 INFO L483 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) [2021-07-13 20:19:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6219 transitions. [2021-07-13 20:19:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:27,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:27,794 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:28,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:28,009 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:28,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1987345865, now seen corresponding path program 24 times [2021-07-13 20:19:28,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:28,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331339714] [2021-07-13 20:19:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:28,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:28,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331339714] [2021-07-13 20:19:28,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331339714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:28,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013397669] [2021-07-13 20:19:28,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:28,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:28,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:28,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:28,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:28,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013397669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:28,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:28,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:19:28,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951707506] [2021-07-13 20:19:28,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:19:28,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:28,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:19:28,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:19:28,147 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) [2021-07-13 20:19:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:28,385 INFO L93 Difference]: Finished difference Result 3009 states and 9316 transitions. [2021-07-13 20:19:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:19:28,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:28,390 INFO L225 Difference]: With dead ends: 3009 [2021-07-13 20:19:28,390 INFO L226 Difference]: Without dead ends: 2993 [2021-07-13 20:19:28,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-07-13 20:19:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1936. [2021-07-13 20:19:28,417 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) [2021-07-13 20:19:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 6233 transitions. [2021-07-13 20:19:28,420 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 6233 transitions. Word has length 27 [2021-07-13 20:19:28,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:28,421 INFO L482 AbstractCegarLoop]: Abstraction has 1936 states and 6233 transitions. [2021-07-13 20:19:28,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 6233 transitions. [2021-07-13 20:19:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:28,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:28,424 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:28,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 20:19:28,633 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:28,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:28,633 INFO L82 PathProgramCache]: Analyzing trace with hash 353835191, now seen corresponding path program 25 times [2021-07-13 20:19:28,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:28,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762015764] [2021-07-13 20:19:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:28,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:28,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762015764] [2021-07-13 20:19:28,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762015764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:28,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059986857] [2021-07-13 20:19:28,662 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 [2021-07-13 20:19:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:28,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:28,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059986857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:28,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:28,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:28,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207541818] [2021-07-13 20:19:28,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:28,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:28,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:28,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:28,777 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) [2021-07-13 20:19:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:29,303 INFO L93 Difference]: Finished difference Result 5256 states and 16466 transitions. [2021-07-13 20:19:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:19:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:29,318 INFO L225 Difference]: With dead ends: 5256 [2021-07-13 20:19:29,318 INFO L226 Difference]: Without dead ends: 5256 [2021-07-13 20:19:29,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:19:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-07-13 20:19:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 2054. [2021-07-13 20:19:29,360 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) [2021-07-13 20:19:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6770 transitions. [2021-07-13 20:19:29,364 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6770 transitions. Word has length 27 [2021-07-13 20:19:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:29,364 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 6770 transitions. [2021-07-13 20:19:29,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6770 transitions. [2021-07-13 20:19:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:29,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:29,367 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:29,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:29,569 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash 159934523, now seen corresponding path program 26 times [2021-07-13 20:19:29,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:29,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248263838] [2021-07-13 20:19:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:29,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:29,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248263838] [2021-07-13 20:19:29,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248263838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:29,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081300479] [2021-07-13 20:19:29,596 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 [2021-07-13 20:19:29,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:29,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:29,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:29,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081300479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:29,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:29,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:29,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671937765] [2021-07-13 20:19:29,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:29,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:29,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:29,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:29,701 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) [2021-07-13 20:19:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:30,204 INFO L93 Difference]: Finished difference Result 5169 states and 16251 transitions. [2021-07-13 20:19:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:19:30,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:30,214 INFO L225 Difference]: With dead ends: 5169 [2021-07-13 20:19:30,214 INFO L226 Difference]: Without dead ends: 5169 [2021-07-13 20:19:30,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:19:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2021-07-13 20:19:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 2051. [2021-07-13 20:19:30,257 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) [2021-07-13 20:19:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-07-13 20:19:30,261 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-07-13 20:19:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:30,261 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-07-13 20:19:30,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-07-13 20:19:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:30,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:30,265 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:30,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:19:30,465 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash -211975243, now seen corresponding path program 27 times [2021-07-13 20:19:30,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:30,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36737977] [2021-07-13 20:19:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:30,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:30,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36737977] [2021-07-13 20:19:30,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36737977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:30,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823147243] [2021-07-13 20:19:30,502 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 [2021-07-13 20:19:30,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:19:30,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:30,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:30,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:30,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823147243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:30,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:30,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:30,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529112868] [2021-07-13 20:19:30,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:30,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:30,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:30,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:30,607 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) [2021-07-13 20:19:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:31,034 INFO L93 Difference]: Finished difference Result 4755 states and 14772 transitions. [2021-07-13 20:19:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:19:31,035 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 [2021-07-13 20:19:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:31,042 INFO L225 Difference]: With dead ends: 4755 [2021-07-13 20:19:31,042 INFO L226 Difference]: Without dead ends: 4755 [2021-07-13 20:19:31,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:19:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2021-07-13 20:19:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 2057. [2021-07-13 20:19:31,095 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) [2021-07-13 20:19:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-07-13 20:19:31,098 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-07-13 20:19:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:31,099 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-07-13 20:19:31,099 INFO L483 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) [2021-07-13 20:19:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-07-13 20:19:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:31,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:31,102 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:31,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:31,302 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:31,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:31,302 INFO L82 PathProgramCache]: Analyzing trace with hash -401193541, now seen corresponding path program 28 times [2021-07-13 20:19:31,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:31,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698445193] [2021-07-13 20:19:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:31,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698445193] [2021-07-13 20:19:31,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698445193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180012119] [2021-07-13 20:19:31,330 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 [2021-07-13 20:19:31,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:31,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:31,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:31,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180012119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:31,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:31,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:31,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872584514] [2021-07-13 20:19:31,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:31,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:31,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:31,411 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) [2021-07-13 20:19:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:31,808 INFO L93 Difference]: Finished difference Result 4606 states and 14402 transitions. [2021-07-13 20:19:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:19:31,808 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 [2021-07-13 20:19:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:31,815 INFO L225 Difference]: With dead ends: 4606 [2021-07-13 20:19:31,815 INFO L226 Difference]: Without dead ends: 4602 [2021-07-13 20:19:31,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:19:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2021-07-13 20:19:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 2051. [2021-07-13 20:19:31,848 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) [2021-07-13 20:19:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-07-13 20:19:31,852 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-07-13 20:19:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:31,852 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-07-13 20:19:31,852 INFO L483 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) [2021-07-13 20:19:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-07-13 20:19:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:31,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:31,855 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:32,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:32,056 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:32,056 INFO L82 PathProgramCache]: Analyzing trace with hash 988327675, now seen corresponding path program 29 times [2021-07-13 20:19:32,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:32,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912410848] [2021-07-13 20:19:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:32,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:32,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912410848] [2021-07-13 20:19:32,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912410848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:32,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991658094] [2021-07-13 20:19:32,089 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 [2021-07-13 20:19:32,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:32,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:32,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:32,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:32,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991658094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:32,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:32,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:32,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691362436] [2021-07-13 20:19:32,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:32,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:32,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:32,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:32,184 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) [2021-07-13 20:19:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:32,602 INFO L93 Difference]: Finished difference Result 4605 states and 14373 transitions. [2021-07-13 20:19:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:19:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:32,610 INFO L225 Difference]: With dead ends: 4605 [2021-07-13 20:19:32,610 INFO L226 Difference]: Without dead ends: 4605 [2021-07-13 20:19:32,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:19:32,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-07-13 20:19:32,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2057. [2021-07-13 20:19:32,650 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) [2021-07-13 20:19:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-07-13 20:19:32,653 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-07-13 20:19:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:32,653 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-07-13 20:19:32,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-07-13 20:19:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:32,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:32,657 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:32,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-07-13 20:19:32,857 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1523990151, now seen corresponding path program 30 times [2021-07-13 20:19:32,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:32,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423317685] [2021-07-13 20:19:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:32,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:32,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423317685] [2021-07-13 20:19:32,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423317685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:32,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919626938] [2021-07-13 20:19:32,905 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 [2021-07-13 20:19:32,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:32,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:32,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:33,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919626938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:33,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:33,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:33,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995285647] [2021-07-13 20:19:33,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:33,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:33,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:33,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:33,052 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) [2021-07-13 20:19:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:33,443 INFO L93 Difference]: Finished difference Result 4532 states and 14195 transitions. [2021-07-13 20:19:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:19:33,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:33,451 INFO L225 Difference]: With dead ends: 4532 [2021-07-13 20:19:33,451 INFO L226 Difference]: Without dead ends: 4528 [2021-07-13 20:19:33,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:19:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-07-13 20:19:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 2051. [2021-07-13 20:19:33,496 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) [2021-07-13 20:19:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-07-13 20:19:33,524 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-07-13 20:19:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:33,524 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-07-13 20:19:33,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-07-13 20:19:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:33,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:33,528 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:33,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:33,733 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:33,733 INFO L82 PathProgramCache]: Analyzing trace with hash -480721671, now seen corresponding path program 31 times [2021-07-13 20:19:33,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:33,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955624817] [2021-07-13 20:19:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:33,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:33,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955624817] [2021-07-13 20:19:33,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955624817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:33,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562304265] [2021-07-13 20:19:33,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:33,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:33,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562304265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:33,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:33,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:19:33,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968736388] [2021-07-13 20:19:33,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:19:33,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:33,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:19:33,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:19:33,841 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) [2021-07-13 20:19:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:34,214 INFO L93 Difference]: Finished difference Result 4168 states and 12771 transitions. [2021-07-13 20:19:34,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:19:34,215 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:34,221 INFO L225 Difference]: With dead ends: 4168 [2021-07-13 20:19:34,221 INFO L226 Difference]: Without dead ends: 4168 [2021-07-13 20:19:34,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:19:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-07-13 20:19:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2247. [2021-07-13 20:19:34,261 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) [2021-07-13 20:19:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7411 transitions. [2021-07-13 20:19:34,265 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7411 transitions. Word has length 27 [2021-07-13 20:19:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:34,265 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7411 transitions. [2021-07-13 20:19:34,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7411 transitions. [2021-07-13 20:19:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:34,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:34,269 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:34,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-13 20:19:34,484 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -669939969, now seen corresponding path program 32 times [2021-07-13 20:19:34,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:34,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987297927] [2021-07-13 20:19:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:34,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:34,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987297927] [2021-07-13 20:19:34,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987297927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:34,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043700356] [2021-07-13 20:19:34,513 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 [2021-07-13 20:19:34,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:34,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:34,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:34,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:34,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043700356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:34,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:34,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:19:34,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371818447] [2021-07-13 20:19:34,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:19:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:34,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:19:34,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:19:34,597 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) [2021-07-13 20:19:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:34,947 INFO L93 Difference]: Finished difference Result 3963 states and 12253 transitions. [2021-07-13 20:19:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:19:34,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:34,954 INFO L225 Difference]: With dead ends: 3963 [2021-07-13 20:19:34,954 INFO L226 Difference]: Without dead ends: 3959 [2021-07-13 20:19:34,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:19:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-07-13 20:19:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 2247. [2021-07-13 20:19:34,987 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) [2021-07-13 20:19:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7409 transitions. [2021-07-13 20:19:34,992 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7409 transitions. Word has length 27 [2021-07-13 20:19:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:34,992 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7409 transitions. [2021-07-13 20:19:34,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7409 transitions. [2021-07-13 20:19:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:34,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:34,995 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:35,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:35,196 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash -26557709, now seen corresponding path program 33 times [2021-07-13 20:19:35,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:35,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871212592] [2021-07-13 20:19:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:35,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:35,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871212592] [2021-07-13 20:19:35,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871212592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:35,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799205711] [2021-07-13 20:19:35,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:35,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:19:35,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:35,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:35,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799205711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:35,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:35,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:19:35,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360919895] [2021-07-13 20:19:35,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:19:35,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:35,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:19:35,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:19:35,315 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) [2021-07-13 20:19:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:35,572 INFO L93 Difference]: Finished difference Result 3687 states and 11591 transitions. [2021-07-13 20:19:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:19:35,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:35,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:35,578 INFO L225 Difference]: With dead ends: 3687 [2021-07-13 20:19:35,579 INFO L226 Difference]: Without dead ends: 3671 [2021-07-13 20:19:35,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-07-13 20:19:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2247. [2021-07-13 20:19:35,612 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) [2021-07-13 20:19:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7403 transitions. [2021-07-13 20:19:35,616 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7403 transitions. Word has length 27 [2021-07-13 20:19:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:35,616 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7403 transitions. [2021-07-13 20:19:35,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7403 transitions. [2021-07-13 20:19:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:35,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:35,619 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:35,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-13 20:19:35,820 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:35,820 INFO L82 PathProgramCache]: Analyzing trace with hash 285798263, now seen corresponding path program 34 times [2021-07-13 20:19:35,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:35,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648311803] [2021-07-13 20:19:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:35,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:35,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648311803] [2021-07-13 20:19:35,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648311803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:35,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728802686] [2021-07-13 20:19:35,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:35,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:35,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:35,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:35,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728802686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:35,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:35,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:35,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613429851] [2021-07-13 20:19:35,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:35,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:35,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:35,945 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) [2021-07-13 20:19:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:36,315 INFO L93 Difference]: Finished difference Result 3798 states and 11861 transitions. [2021-07-13 20:19:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:19:36,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:36,322 INFO L225 Difference]: With dead ends: 3798 [2021-07-13 20:19:36,322 INFO L226 Difference]: Without dead ends: 3798 [2021-07-13 20:19:36,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:19:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-07-13 20:19:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2417. [2021-07-13 20:19:36,368 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) [2021-07-13 20:19:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7942 transitions. [2021-07-13 20:19:36,373 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7942 transitions. Word has length 27 [2021-07-13 20:19:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:36,373 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7942 transitions. [2021-07-13 20:19:36,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7942 transitions. [2021-07-13 20:19:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:36,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:36,376 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:36,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:19:36,577 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2068447733, now seen corresponding path program 35 times [2021-07-13 20:19:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:36,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066594751] [2021-07-13 20:19:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:36,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:36,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066594751] [2021-07-13 20:19:36,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066594751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:36,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002858705] [2021-07-13 20:19:36,612 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 [2021-07-13 20:19:36,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:36,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:36,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:36,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:36,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002858705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:36,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:36,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:19:36,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165318273] [2021-07-13 20:19:36,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:36,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:36,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:36,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:36,707 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) [2021-07-13 20:19:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:37,054 INFO L93 Difference]: Finished difference Result 3765 states and 11785 transitions. [2021-07-13 20:19:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:19:37,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:37,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:37,060 INFO L225 Difference]: With dead ends: 3765 [2021-07-13 20:19:37,060 INFO L226 Difference]: Without dead ends: 3761 [2021-07-13 20:19:37,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:19:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-07-13 20:19:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2417. [2021-07-13 20:19:37,103 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) [2021-07-13 20:19:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7940 transitions. [2021-07-13 20:19:37,107 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7940 transitions. Word has length 27 [2021-07-13 20:19:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:37,108 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7940 transitions. [2021-07-13 20:19:37,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7940 transitions. [2021-07-13 20:19:37,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:19:37,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:37,111 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:37,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:37,321 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:37,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476281, now seen corresponding path program 36 times [2021-07-13 20:19:37,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:37,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315564892] [2021-07-13 20:19:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:37,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:37,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315564892] [2021-07-13 20:19:37,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315564892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:37,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885538948] [2021-07-13 20:19:37,356 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 [2021-07-13 20:19:37,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:37,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:37,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:37,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885538948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:37,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:37,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:37,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541097132] [2021-07-13 20:19:37,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:37,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:37,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:37,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:37,433 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) [2021-07-13 20:19:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:37,635 INFO L93 Difference]: Finished difference Result 3553 states and 11291 transitions. [2021-07-13 20:19:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:19:37,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:19:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:37,641 INFO L225 Difference]: With dead ends: 3553 [2021-07-13 20:19:37,641 INFO L226 Difference]: Without dead ends: 3537 [2021-07-13 20:19:37,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-07-13 20:19:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2417. [2021-07-13 20:19:37,673 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) [2021-07-13 20:19:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7934 transitions. [2021-07-13 20:19:37,678 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7934 transitions. Word has length 27 [2021-07-13 20:19:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:37,678 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7934 transitions. [2021-07-13 20:19:37,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7934 transitions. [2021-07-13 20:19:37,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:19:37,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:37,682 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:37,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 20:19:37,882 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:37,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:37,883 INFO L82 PathProgramCache]: Analyzing trace with hash -469751287, now seen corresponding path program 4 times [2021-07-13 20:19:37,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:37,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435446070] [2021-07-13 20:19:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:38,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:38,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435446070] [2021-07-13 20:19:38,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435446070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584493100] [2021-07-13 20:19:38,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:38,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:38,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:38,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:38,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:38,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:38,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:38,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:19:38,442 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:38,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:38,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:38,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:19:38,453 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:38,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:38,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:38,465 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 [2021-07-13 20:19:38,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:38,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:38,479 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. [2021-07-13 20:19:38,479 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:19:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:38,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584493100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:38,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:38,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:19:38,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658692455] [2021-07-13 20:19:38,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:19:38,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:38,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:19:38,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:38,503 INFO L87 Difference]: Start difference. First operand 2417 states and 7934 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:39,364 INFO L93 Difference]: Finished difference Result 3240 states and 10404 transitions. [2021-07-13 20:19:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:19:39,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:19:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:39,371 INFO L225 Difference]: With dead ends: 3240 [2021-07-13 20:19:39,371 INFO L226 Difference]: Without dead ends: 3225 [2021-07-13 20:19:39,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 836.6ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:19:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-07-13 20:19:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2459. [2021-07-13 20:19:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 3.2782750203417415) internal successors, (8058), 2458 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 8058 transitions. [2021-07-13 20:19:39,408 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 8058 transitions. Word has length 30 [2021-07-13 20:19:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:39,408 INFO L482 AbstractCegarLoop]: Abstraction has 2459 states and 8058 transitions. [2021-07-13 20:19:39,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 8058 transitions. [2021-07-13 20:19:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:19:39,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:39,412 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:39,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:39,617 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:39,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1937124355, now seen corresponding path program 5 times [2021-07-13 20:19:39,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:39,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180196047] [2021-07-13 20:19:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:39,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:39,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180196047] [2021-07-13 20:19:39,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180196047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:39,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630082863] [2021-07-13 20:19:39,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:39,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:19:39,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:19:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:40,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:40,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:40,199 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 [2021-07-13 20:19:40,201 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:40,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:40,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:40,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:40,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:19:40,212 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:40,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:40,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:40,223 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 [2021-07-13 20:19:40,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:40,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:40,234 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. [2021-07-13 20:19:40,234 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:19:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:40,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630082863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:40,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:40,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:19:40,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339387631] [2021-07-13 20:19:40,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:19:40,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:19:40,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:40,254 INFO L87 Difference]: Start difference. First operand 2459 states and 8058 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:41,621 INFO L93 Difference]: Finished difference Result 3258 states and 10455 transitions. [2021-07-13 20:19:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:19:41,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:19:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:41,628 INFO L225 Difference]: With dead ends: 3258 [2021-07-13 20:19:41,628 INFO L226 Difference]: Without dead ends: 3243 [2021-07-13 20:19:41,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1284.6ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:19:41,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-07-13 20:19:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 2471. [2021-07-13 20:19:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 3.2753036437246963) internal successors, (8090), 2470 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 8090 transitions. [2021-07-13 20:19:41,667 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 8090 transitions. Word has length 30 [2021-07-13 20:19:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:41,668 INFO L482 AbstractCegarLoop]: Abstraction has 2471 states and 8090 transitions. [2021-07-13 20:19:41,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 8090 transitions. [2021-07-13 20:19:41,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:19:41,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:41,671 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:41,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:41,888 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:41,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1694795916, now seen corresponding path program 37 times [2021-07-13 20:19:41,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:41,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869287854] [2021-07-13 20:19:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:42,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:42,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869287854] [2021-07-13 20:19:42,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869287854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:42,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440129506] [2021-07-13 20:19:42,367 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 [2021-07-13 20:19:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:42,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:19:42,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:42,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:42,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:42,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:42,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:42,631 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 [2021-07-13 20:19:42,633 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:42,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:42,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:42,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:42,646 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 [2021-07-13 20:19:42,648 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:42,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:42,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:42,662 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 [2021-07-13 20:19:42,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:42,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:42,676 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. [2021-07-13 20:19:42,676 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:19:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:42,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440129506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:42,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:42,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:19:42,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621911427] [2021-07-13 20:19:42,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:19:42,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:19:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:42,697 INFO L87 Difference]: Start difference. First operand 2471 states and 8090 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) [2021-07-13 20:19:46,438 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-07-13 20:19:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:47,088 INFO L93 Difference]: Finished difference Result 3579 states and 11315 transitions. [2021-07-13 20:19:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:19:47,089 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 [2021-07-13 20:19:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:47,095 INFO L225 Difference]: With dead ends: 3579 [2021-07-13 20:19:47,095 INFO L226 Difference]: Without dead ends: 3553 [2021-07-13 20:19:47,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 3983.2ms TimeCoverageRelationStatistics Valid=836, Invalid=5644, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:19:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-07-13 20:19:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2550. [2021-07-13 20:19:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.26480972930561) internal successors, (8322), 2549 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8322 transitions. [2021-07-13 20:19:47,137 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8322 transitions. Word has length 30 [2021-07-13 20:19:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:47,137 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8322 transitions. [2021-07-13 20:19:47,137 INFO L483 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) [2021-07-13 20:19:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8322 transitions. [2021-07-13 20:19:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:19:47,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:47,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:47,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:47,351 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:47,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1505897713, now seen corresponding path program 6 times [2021-07-13 20:19:47,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:47,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214637193] [2021-07-13 20:19:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:47,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:47,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214637193] [2021-07-13 20:19:47,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214637193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:47,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697895308] [2021-07-13 20:19:47,655 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 [2021-07-13 20:19:47,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:19:47,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:19:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:47,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:47,848 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 [2021-07-13 20:19:47,868 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:47,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:47,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:47,885 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 [2021-07-13 20:19:47,904 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:47,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:47,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:47,934 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 [2021-07-13 20:19:47,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:19:48,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:48,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:48,031 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-07-13 20:19:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:48,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697895308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:48,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:48,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:19:48,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939536686] [2021-07-13 20:19:48,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:19:48,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:48,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:19:48,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:48,111 INFO L87 Difference]: Start difference. First operand 2550 states and 8322 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:50,577 INFO L93 Difference]: Finished difference Result 4146 states and 13081 transitions. [2021-07-13 20:19:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:19:50,577 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:19:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:50,585 INFO L225 Difference]: With dead ends: 4146 [2021-07-13 20:19:50,585 INFO L226 Difference]: Without dead ends: 4121 [2021-07-13 20:19:50,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1848.4ms TimeCoverageRelationStatistics Valid=431, Invalid=2875, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:19:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-07-13 20:19:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 2618. [2021-07-13 20:19:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 3.2777990064959877) internal successors, (8578), 2617 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 8578 transitions. [2021-07-13 20:19:50,630 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 8578 transitions. Word has length 30 [2021-07-13 20:19:50,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:50,630 INFO L482 AbstractCegarLoop]: Abstraction has 2618 states and 8578 transitions. [2021-07-13 20:19:50,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 8578 transitions. [2021-07-13 20:19:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:19:50,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:50,633 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:50,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:50,834 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:50,834 INFO L82 PathProgramCache]: Analyzing trace with hash 475821444, now seen corresponding path program 38 times [2021-07-13 20:19:50,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:50,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650651988] [2021-07-13 20:19:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:51,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:51,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650651988] [2021-07-13 20:19:51,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650651988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:51,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932491301] [2021-07-13 20:19:51,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:51,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:51,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:19:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:51,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:51,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:51,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-13 20:19:51,541 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:51,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:51,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:51,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:51,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:51,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:51,551 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 [2021-07-13 20:19:51,558 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:51,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:51,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:51,570 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 [2021-07-13 20:19:51,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:51,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:51,580 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. [2021-07-13 20:19:51,580 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:19:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:51,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932491301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:51,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:51,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:19:51,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052472793] [2021-07-13 20:19:51,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:19:51,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:19:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:51,599 INFO L87 Difference]: Start difference. First operand 2618 states and 8578 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:53,304 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-13 20:19:53,544 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-07-13 20:19:53,862 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-07-13 20:19:53,983 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-13 20:19:54,434 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-07-13 20:19:55,009 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-07-13 20:19:55,556 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-07-13 20:19:56,582 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-07-13 20:19:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:57,960 INFO L93 Difference]: Finished difference Result 4273 states and 13434 transitions. [2021-07-13 20:19:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:19:57,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:19:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:57,968 INFO L225 Difference]: With dead ends: 4273 [2021-07-13 20:19:57,968 INFO L226 Difference]: Without dead ends: 4251 [2021-07-13 20:19:57,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 5654.7ms TimeCoverageRelationStatistics Valid=1231, Invalid=7511, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:19:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-07-13 20:19:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 2648. [2021-07-13 20:19:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 3.2795617680392897) internal successors, (8681), 2647 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 8681 transitions. [2021-07-13 20:19:58,015 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 8681 transitions. Word has length 30 [2021-07-13 20:19:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:58,015 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 8681 transitions. [2021-07-13 20:19:58,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 8681 transitions. [2021-07-13 20:19:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:19:58,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:58,019 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:58,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 20:19:58,219 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash 964342132, now seen corresponding path program 39 times [2021-07-13 20:19:58,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:58,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594253261] [2021-07-13 20:19:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:58,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594253261] [2021-07-13 20:19:58,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594253261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949251984] [2021-07-13 20:19:58,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:58,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:19:58,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:58,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:19:58,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:58,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:58,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:58,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:58,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:58,815 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 [2021-07-13 20:19:58,817 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:58,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:58,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:58,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:58,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:19:58,829 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:58,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:58,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:58,841 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 [2021-07-13 20:19:58,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:58,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:58,854 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. [2021-07-13 20:19:58,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:19:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:58,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949251984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:58,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:58,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-13 20:19:58,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141979122] [2021-07-13 20:19:58,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:19:58,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:58,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:19:58,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:58,884 INFO L87 Difference]: Start difference. First operand 2648 states and 8681 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:00,890 INFO L93 Difference]: Finished difference Result 4578 states and 14253 transitions. [2021-07-13 20:20:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:20:00,890 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:00,898 INFO L225 Difference]: With dead ends: 4578 [2021-07-13 20:20:00,899 INFO L226 Difference]: Without dead ends: 4548 [2021-07-13 20:20:00,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1605.9ms TimeCoverageRelationStatistics Valid=380, Invalid=2926, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:20:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-07-13 20:20:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2789. [2021-07-13 20:20:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 3.2672166427546627) internal successors, (9109), 2788 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 9109 transitions. [2021-07-13 20:20:00,947 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 9109 transitions. Word has length 30 [2021-07-13 20:20:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:00,948 INFO L482 AbstractCegarLoop]: Abstraction has 2789 states and 9109 transitions. [2021-07-13 20:20:00,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 9109 transitions. [2021-07-13 20:20:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:00,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:00,951 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:01,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:20:01,152 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash 804456365, now seen corresponding path program 7 times [2021-07-13 20:20:01,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:01,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836777190] [2021-07-13 20:20:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:01,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:01,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836777190] [2021-07-13 20:20:01,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836777190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:01,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116715683] [2021-07-13 20:20:01,477 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 [2021-07-13 20:20:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:20:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:01,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:01,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:20:01,705 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:01,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:01,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:20:01,716 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:01,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:01,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:01,728 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 [2021-07-13 20:20:01,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:01,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:01,738 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. [2021-07-13 20:20:01,739 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:20:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:01,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116715683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:01,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:01,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:20:01,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22003455] [2021-07-13 20:20:01,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:20:01,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:01,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:20:01,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:20:01,755 INFO L87 Difference]: Start difference. First operand 2789 states and 9109 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:02,674 INFO L93 Difference]: Finished difference Result 3530 states and 11354 transitions. [2021-07-13 20:20:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:20:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:02,681 INFO L225 Difference]: With dead ends: 3530 [2021-07-13 20:20:02,681 INFO L226 Difference]: Without dead ends: 3515 [2021-07-13 20:20:02,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 893.3ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:20:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-07-13 20:20:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 2803. [2021-07-13 20:20:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 3.2658815132048535) internal successors, (9151), 2802 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 9151 transitions. [2021-07-13 20:20:02,729 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 9151 transitions. Word has length 30 [2021-07-13 20:20:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:02,729 INFO L482 AbstractCegarLoop]: Abstraction has 2803 states and 9151 transitions. [2021-07-13 20:20:02,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 9151 transitions. [2021-07-13 20:20:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:02,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:02,733 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:02,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:20:02,933 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:02,934 INFO L82 PathProgramCache]: Analyzing trace with hash -662916703, now seen corresponding path program 8 times [2021-07-13 20:20:02,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:02,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605279985] [2021-07-13 20:20:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:03,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:03,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605279985] [2021-07-13 20:20:03,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605279985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:03,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374066374] [2021-07-13 20:20:03,215 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) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:03,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:03,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:03,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:20:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:03,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:03,390 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 [2021-07-13 20:20:03,413 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:03,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:03,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:03,432 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 [2021-07-13 20:20:03,452 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:03,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:03,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:03,482 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 [2021-07-13 20:20:03,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:20:03,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:03,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:03,542 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-07-13 20:20:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:03,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374066374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:03,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:03,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:20:03,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815600091] [2021-07-13 20:20:03,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:20:03,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:03,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:20:03,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:20:03,603 INFO L87 Difference]: Start difference. First operand 2803 states and 9151 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:05,671 INFO L93 Difference]: Finished difference Result 4025 states and 12918 transitions. [2021-07-13 20:20:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:20:05,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:05,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:05,678 INFO L225 Difference]: With dead ends: 4025 [2021-07-13 20:20:05,678 INFO L226 Difference]: Without dead ends: 4000 [2021-07-13 20:20:05,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1525.4ms TimeCoverageRelationStatistics Valid=362, Invalid=2394, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:20:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2021-07-13 20:20:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 2795. [2021-07-13 20:20:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 3.267716535433071) internal successors, (9130), 2794 states have internal predecessors, (9130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 9130 transitions. [2021-07-13 20:20:05,723 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 9130 transitions. Word has length 30 [2021-07-13 20:20:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:05,723 INFO L482 AbstractCegarLoop]: Abstraction has 2795 states and 9130 transitions. [2021-07-13 20:20:05,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 9130 transitions. [2021-07-13 20:20:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:05,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:05,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:05,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:20:05,927 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash -281439163, now seen corresponding path program 9 times [2021-07-13 20:20:05,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:05,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694824924] [2021-07-13 20:20:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:06,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:06,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694824924] [2021-07-13 20:20:06,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694824924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:06,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066669332] [2021-07-13 20:20:06,219 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 [2021-07-13 20:20:06,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:20:06,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:20:06,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:06,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:06,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:06,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:20:06,491 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:06,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:06,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:06,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:06,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:20:06,504 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:06,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:06,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:06,532 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 [2021-07-13 20:20:06,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:06,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:06,545 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. [2021-07-13 20:20:06,546 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:52, output treesize:3 [2021-07-13 20:20:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:06,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066669332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:06,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:06,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:20:06,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764216672] [2021-07-13 20:20:06,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:20:06,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:06,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:20:06,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:20:06,563 INFO L87 Difference]: Start difference. First operand 2795 states and 9130 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:07,295 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-07-13 20:20:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:10,373 INFO L93 Difference]: Finished difference Result 3604 states and 11567 transitions. [2021-07-13 20:20:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:20:10,374 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:10,381 INFO L225 Difference]: With dead ends: 3604 [2021-07-13 20:20:10,381 INFO L226 Difference]: Without dead ends: 3589 [2021-07-13 20:20:10,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1546.4ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:20:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-07-13 20:20:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2807. [2021-07-13 20:20:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 3.270848182466144) internal successors, (9178), 2806 states have internal predecessors, (9178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 9178 transitions. [2021-07-13 20:20:10,427 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 9178 transitions. Word has length 30 [2021-07-13 20:20:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:10,427 INFO L482 AbstractCegarLoop]: Abstraction has 2807 states and 9178 transitions. [2021-07-13 20:20:10,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 9178 transitions. [2021-07-13 20:20:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:10,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:10,432 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:10,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:10,647 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1858531407, now seen corresponding path program 10 times [2021-07-13 20:20:10,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:10,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058921572] [2021-07-13 20:20:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:10,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058921572] [2021-07-13 20:20:10,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058921572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645738947] [2021-07-13 20:20:10,983 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 [2021-07-13 20:20:11,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:11,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:11,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:20:11,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:11,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:11,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:11,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 64 treesize of output 52 [2021-07-13 20:20:11,184 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:11,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:11,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:11,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:11,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-07-13 20:20:11,198 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:11,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:11,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:11,210 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 40 treesize of output 28 [2021-07-13 20:20:11,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:11,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:11,221 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. [2021-07-13 20:20:11,221 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:7 [2021-07-13 20:20:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:11,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645738947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:11,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:11,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:20:11,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622160071] [2021-07-13 20:20:11,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:20:11,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:11,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:20:11,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:20:11,243 INFO L87 Difference]: Start difference. First operand 2807 states and 9178 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:12,111 INFO L93 Difference]: Finished difference Result 3655 states and 11758 transitions. [2021-07-13 20:20:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:20:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:12,117 INFO L225 Difference]: With dead ends: 3655 [2021-07-13 20:20:12,117 INFO L226 Difference]: Without dead ends: 3636 [2021-07-13 20:20:12,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 795.3ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:20:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-07-13 20:20:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2851. [2021-07-13 20:20:12,152 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) [2021-07-13 20:20:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-07-13 20:20:12,157 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-07-13 20:20:12,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:12,157 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-07-13 20:20:12,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-07-13 20:20:12,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:12,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:12,161 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:12,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:12,364 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:12,364 INFO L82 PathProgramCache]: Analyzing trace with hash 123759631, now seen corresponding path program 11 times [2021-07-13 20:20:12,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:12,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270779441] [2021-07-13 20:20:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:12,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270779441] [2021-07-13 20:20:12,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270779441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586711665] [2021-07-13 20:20:12,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:12,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:20:12,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:12,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:20:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,920 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-07-13 20:20:12,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 202 [2021-07-13 20:20:12,936 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:12,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:12,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,969 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-07-13 20:20:12,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 140 [2021-07-13 20:20:13,013 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:13,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:13,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:13,046 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 103 treesize of output 91 [2021-07-13 20:20:13,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:13,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:13,125 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. [2021-07-13 20:20:13,125 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:245, output treesize:19 [2021-07-13 20:20:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:13,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586711665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:13,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:13,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:20:13,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13246473] [2021-07-13 20:20:13,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:20:13,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:20:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:13,172 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:27,511 INFO L93 Difference]: Finished difference Result 4431 states and 14103 transitions. [2021-07-13 20:20:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:20:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:27,519 INFO L225 Difference]: With dead ends: 4431 [2021-07-13 20:20:27,519 INFO L226 Difference]: Without dead ends: 4401 [2021-07-13 20:20:27,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 8058.8ms TimeCoverageRelationStatistics Valid=479, Invalid=2707, Unknown=6, NotChecked=0, Total=3192 [2021-07-13 20:20:27,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-07-13 20:20:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2851. [2021-07-13 20:20:27,560 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) [2021-07-13 20:20:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-07-13 20:20:27,565 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-07-13 20:20:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:27,566 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-07-13 20:20:27,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-07-13 20:20:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:27,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:27,569 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:27,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 20:20:27,785 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:27,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1795725574, now seen corresponding path program 40 times [2021-07-13 20:20:27,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:27,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619766153] [2021-07-13 20:20:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:28,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:28,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619766153] [2021-07-13 20:20:28,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619766153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:28,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136838801] [2021-07-13 20:20:28,109 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:28,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:28,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:20:28,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:28,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:28,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:28,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:28,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:28,347 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 [2021-07-13 20:20:28,348 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:28,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:28,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:28,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:28,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:20:28,362 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:28,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:28,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:28,373 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 [2021-07-13 20:20:28,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:28,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:28,383 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. [2021-07-13 20:20:28,383 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:20:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:28,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136838801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:28,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:28,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-13 20:20:28,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194941678] [2021-07-13 20:20:28,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:28,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:28,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:28,405 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:31,351 INFO L93 Difference]: Finished difference Result 5434 states and 16862 transitions. [2021-07-13 20:20:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:20:31,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:31,362 INFO L225 Difference]: With dead ends: 5434 [2021-07-13 20:20:31,362 INFO L226 Difference]: Without dead ends: 5404 [2021-07-13 20:20:31,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2495.9ms TimeCoverageRelationStatistics Valid=667, Invalid=3889, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:20:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2021-07-13 20:20:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 2923. [2021-07-13 20:20:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.2902121834360027) internal successors, (9614), 2922 states have internal predecessors, (9614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 9614 transitions. [2021-07-13 20:20:31,424 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 9614 transitions. Word has length 30 [2021-07-13 20:20:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:31,424 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 9614 transitions. [2021-07-13 20:20:31,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 9614 transitions. [2021-07-13 20:20:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:31,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:31,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:31,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 20:20:31,629 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:31,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1512353848, now seen corresponding path program 41 times [2021-07-13 20:20:31,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:31,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962559539] [2021-07-13 20:20:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:31,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:31,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962559539] [2021-07-13 20:20:31,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962559539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:31,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850046611] [2021-07-13 20:20:31,975 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:32,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:20:32,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:20:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:32,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:32,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:32,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:20:32,222 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:32,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:32,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:32,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:32,232 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 [2021-07-13 20:20:32,234 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:32,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:32,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:32,246 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 [2021-07-13 20:20:32,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:32,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:32,257 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. [2021-07-13 20:20:32,257 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:20:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:32,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850046611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:32,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:32,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-13 20:20:32,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39635936] [2021-07-13 20:20:32,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:32,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:32,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:32,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:32,278 INFO L87 Difference]: Start difference. First operand 2923 states and 9614 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:34,944 INFO L93 Difference]: Finished difference Result 5109 states and 16139 transitions. [2021-07-13 20:20:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:20:34,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:34,953 INFO L225 Difference]: With dead ends: 5109 [2021-07-13 20:20:34,953 INFO L226 Difference]: Without dead ends: 5079 [2021-07-13 20:20:34,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2407.3ms TimeCoverageRelationStatistics Valid=644, Invalid=3516, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:20:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2021-07-13 20:20:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 2927. [2021-07-13 20:20:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 3.2911825017088177) internal successors, (9630), 2926 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 9630 transitions. [2021-07-13 20:20:35,007 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 9630 transitions. Word has length 30 [2021-07-13 20:20:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:35,007 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 9630 transitions. [2021-07-13 20:20:35,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 9630 transitions. [2021-07-13 20:20:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:35,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:35,011 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:35,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 20:20:35,212 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:35,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:35,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1009505612, now seen corresponding path program 42 times [2021-07-13 20:20:35,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:35,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414480071] [2021-07-13 20:20:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:35,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:35,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414480071] [2021-07-13 20:20:35,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414480071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:35,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212153062] [2021-07-13 20:20:35,538 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:35,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:20:35,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:35,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:20:35,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,761 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:20:35,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 193 [2021-07-13 20:20:35,833 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:35,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,878 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:20:35,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 175 [2021-07-13 20:20:36,027 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:36,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:36,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:36,089 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 [2021-07-13 20:20:36,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:36,800 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 111 [2021-07-13 20:20:36,801 INFO L628 ElimStorePlain]: treesize reduction 580, result has 71.1 percent of original size [2021-07-13 20:20:37,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:37,246 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:210, output treesize:34 [2021-07-13 20:20:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:37,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212153062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:37,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:37,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-07-13 20:20:37,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214110496] [2021-07-13 20:20:37,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:37,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:37,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:37,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:37,329 INFO L87 Difference]: Start difference. First operand 2927 states and 9630 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:40,124 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-07-13 20:20:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:41,606 INFO L93 Difference]: Finished difference Result 5927 states and 18549 transitions. [2021-07-13 20:20:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:20:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:41,618 INFO L225 Difference]: With dead ends: 5927 [2021-07-13 20:20:41,618 INFO L226 Difference]: Without dead ends: 5901 [2021-07-13 20:20:41,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 3688.2ms TimeCoverageRelationStatistics Valid=1066, Invalid=5906, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:20:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-07-13 20:20:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 2939. [2021-07-13 20:20:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 3.2950987066031314) internal successors, (9681), 2938 states have internal predecessors, (9681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 9681 transitions. [2021-07-13 20:20:41,683 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 9681 transitions. Word has length 30 [2021-07-13 20:20:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:41,684 INFO L482 AbstractCegarLoop]: Abstraction has 2939 states and 9681 transitions. [2021-07-13 20:20:41,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 9681 transitions. [2021-07-13 20:20:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:41,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:41,701 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:41,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 20:20:41,902 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:41,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:41,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2054481296, now seen corresponding path program 43 times [2021-07-13 20:20:41,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:41,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075737657] [2021-07-13 20:20:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:42,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:42,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075737657] [2021-07-13 20:20:42,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075737657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:42,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102867145] [2021-07-13 20:20:42,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:20:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:42,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:42,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:42,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:42,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:42,641 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 47 treesize of output 37 [2021-07-13 20:20:42,643 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:42,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:42,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:42,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:42,655 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 [2021-07-13 20:20:42,656 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:42,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:42,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:42,668 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 [2021-07-13 20:20:42,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:42,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:42,679 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. [2021-07-13 20:20:42,679 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:20:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:42,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102867145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:42,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:42,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:20:42,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940902375] [2021-07-13 20:20:42,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:20:42,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:42,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:20:42,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:42,700 INFO L87 Difference]: Start difference. First operand 2939 states and 9681 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) [2021-07-13 20:20:43,792 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-07-13 20:20:44,155 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-13 20:20:44,847 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-07-13 20:20:45,104 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-13 20:20:45,569 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-13 20:20:46,048 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-07-13 20:20:46,339 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-07-13 20:20:46,768 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-07-13 20:20:47,281 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-07-13 20:20:48,050 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-07-13 20:20:48,335 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-13 20:20:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:49,633 INFO L93 Difference]: Finished difference Result 4187 states and 13280 transitions. [2021-07-13 20:20:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:20:49,633 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 [2021-07-13 20:20:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:49,640 INFO L225 Difference]: With dead ends: 4187 [2021-07-13 20:20:49,640 INFO L226 Difference]: Without dead ends: 4161 [2021-07-13 20:20:49,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 6268.6ms TimeCoverageRelationStatistics Valid=1045, Invalid=7327, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:20:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-07-13 20:20:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 2933. [2021-07-13 20:20:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2932 states have (on average 3.2946793997271486) internal successors, (9660), 2932 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 9660 transitions. [2021-07-13 20:20:49,685 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 9660 transitions. Word has length 30 [2021-07-13 20:20:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:49,685 INFO L482 AbstractCegarLoop]: Abstraction has 2933 states and 9660 transitions. [2021-07-13 20:20:49,685 INFO L483 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) [2021-07-13 20:20:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 9660 transitions. [2021-07-13 20:20:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:49,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:49,689 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:49,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:49,904 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash -846736199, now seen corresponding path program 12 times [2021-07-13 20:20:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:49,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865231336] [2021-07-13 20:20:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:50,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:50,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865231336] [2021-07-13 20:20:50,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865231336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:50,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463365014] [2021-07-13 20:20:50,234 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) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:50,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:20:50,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:50,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:20:50,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:50,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:50,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:20:50,529 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:50,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:50,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:50,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:20:50,592 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:50,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:50,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:50,636 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 [2021-07-13 20:20:50,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:20:50,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:50,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:50,778 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:42 [2021-07-13 20:20:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:50,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463365014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:50,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:50,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-07-13 20:20:50,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280523626] [2021-07-13 20:20:50,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:20:50,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:50,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:20:50,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:50,879 INFO L87 Difference]: Start difference. First operand 2933 states and 9660 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:52,453 INFO L93 Difference]: Finished difference Result 3927 states and 12626 transitions. [2021-07-13 20:20:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:20:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:52,461 INFO L225 Difference]: With dead ends: 3927 [2021-07-13 20:20:52,461 INFO L226 Difference]: Without dead ends: 3906 [2021-07-13 20:20:52,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1401.2ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:20:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2021-07-13 20:20:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 2956. [2021-07-13 20:20:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.299830795262267) internal successors, (9751), 2955 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 9751 transitions. [2021-07-13 20:20:52,506 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 9751 transitions. Word has length 30 [2021-07-13 20:20:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:52,506 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 9751 transitions. [2021-07-13 20:20:52,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:52,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 9751 transitions. [2021-07-13 20:20:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:52,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:52,510 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:52,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:52,723 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash -930058093, now seen corresponding path program 13 times [2021-07-13 20:20:52,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:52,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027466024] [2021-07-13 20:20:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:53,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:53,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027466024] [2021-07-13 20:20:53,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027466024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:53,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680670564] [2021-07-13 20:20:53,006 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 [2021-07-13 20:20:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:53,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:20:53,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:53,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:53,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:20:53,222 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:53,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:53,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:53,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:53,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:20:53,258 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:53,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:53,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:53,289 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 [2021-07-13 20:20:53,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:20:53,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:53,381 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. [2021-07-13 20:20:53,381 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2021-07-13 20:20:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:53,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680670564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:53,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:53,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:20:53,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755452637] [2021-07-13 20:20:53,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:20:53,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:53,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:20:53,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:20:53,434 INFO L87 Difference]: Start difference. First operand 2956 states and 9751 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:54,306 INFO L93 Difference]: Finished difference Result 4273 states and 13760 transitions. [2021-07-13 20:20:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:20:54,306 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:54,314 INFO L225 Difference]: With dead ends: 4273 [2021-07-13 20:20:54,314 INFO L226 Difference]: Without dead ends: 4248 [2021-07-13 20:20:54,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:20:54,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2021-07-13 20:20:54,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 2950. [2021-07-13 20:20:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.2973889454052223) internal successors, (9724), 2949 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9724 transitions. [2021-07-13 20:20:54,364 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9724 transitions. Word has length 30 [2021-07-13 20:20:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:54,364 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9724 transitions. [2021-07-13 20:20:54,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9724 transitions. [2021-07-13 20:20:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:54,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:54,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:54,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:54,568 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:54,569 INFO L82 PathProgramCache]: Analyzing trace with hash -568960327, now seen corresponding path program 14 times [2021-07-13 20:20:54,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:54,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964374006] [2021-07-13 20:20:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:54,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:54,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964374006] [2021-07-13 20:20:54,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964374006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:54,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442409147] [2021-07-13 20:20:54,884 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 [2021-07-13 20:20:54,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:54,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:20:54,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:55,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:55,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:55,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:20:55,083 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:55,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:55,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:55,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:55,103 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 [2021-07-13 20:20:55,136 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:55,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:55,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:55,180 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 [2021-07-13 20:20:55,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:20:55,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:55,260 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. [2021-07-13 20:20:55,260 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:92 [2021-07-13 20:20:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:55,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442409147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:55,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:55,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:20:55,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994409054] [2021-07-13 20:20:55,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:20:55,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:20:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:20:55,333 INFO L87 Difference]: Start difference. First operand 2950 states and 9724 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:55,955 INFO L93 Difference]: Finished difference Result 3921 states and 12756 transitions. [2021-07-13 20:20:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:20:55,956 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:55,963 INFO L225 Difference]: With dead ends: 3921 [2021-07-13 20:20:55,963 INFO L226 Difference]: Without dead ends: 3896 [2021-07-13 20:20:55,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:20:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-07-13 20:20:56,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 2950. [2021-07-13 20:20:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.2973889454052223) internal successors, (9724), 2949 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9724 transitions. [2021-07-13 20:20:56,019 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9724 transitions. Word has length 30 [2021-07-13 20:20:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:56,019 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9724 transitions. [2021-07-13 20:20:56,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9724 transitions. [2021-07-13 20:20:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:56,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:56,023 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:56,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:56,230 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:56,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:56,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1088124239, now seen corresponding path program 15 times [2021-07-13 20:20:56,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:56,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228127603] [2021-07-13 20:20:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:56,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:56,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228127603] [2021-07-13 20:20:56,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228127603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:56,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326550812] [2021-07-13 20:20:56,505 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 [2021-07-13 20:20:56,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:20:56,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:56,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:20:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:58,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,477 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 [2021-07-13 20:20:58,577 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:58,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,613 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 [2021-07-13 20:20:58,682 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:20:58,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,738 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 [2021-07-13 20:20:58,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:20:58,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,967 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. [2021-07-13 20:20:58,967 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:249 [2021-07-13 20:20:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:59,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326550812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:59,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:59,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-13 20:20:59,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548415540] [2021-07-13 20:20:59,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:59,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:59,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:59,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=437, Unknown=2, NotChecked=0, Total=506 [2021-07-13 20:20:59,208 INFO L87 Difference]: Start difference. First operand 2950 states and 9724 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:10,539 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-07-13 20:21:22,249 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-07-13 20:21:25,105 WARN L205 SmtUtils]: Spent 999.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:21:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:31,084 INFO L93 Difference]: Finished difference Result 3899 states and 12544 transitions. [2021-07-13 20:21:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:21:31,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:31,092 INFO L225 Difference]: With dead ends: 3899 [2021-07-13 20:21:31,092 INFO L226 Difference]: Without dead ends: 3884 [2021-07-13 20:21:31,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 15336.4ms TimeCoverageRelationStatistics Valid=393, Invalid=2462, Unknown=7, NotChecked=0, Total=2862 [2021-07-13 20:21:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2021-07-13 20:21:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2950. [2021-07-13 20:21:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.2973889454052223) internal successors, (9724), 2949 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9724 transitions. [2021-07-13 20:21:31,137 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9724 transitions. Word has length 30 [2021-07-13 20:21:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:31,137 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9724 transitions. [2021-07-13 20:21:31,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9724 transitions. [2021-07-13 20:21:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:31,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:31,142 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:31,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-13 20:21:31,358 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:31,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1739469989, now seen corresponding path program 16 times [2021-07-13 20:21:31,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:31,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651937157] [2021-07-13 20:21:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:31,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:31,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651937157] [2021-07-13 20:21:31,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651937157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:31,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129161002] [2021-07-13 20:21:31,641 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 [2021-07-13 20:21:31,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:31,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:31,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:21:31,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:31,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:31,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:21:31,865 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:31,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:31,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:31,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:31,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:21:31,876 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:31,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:31,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:31,887 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 [2021-07-13 20:21:31,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:31,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:31,897 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. [2021-07-13 20:21:31,897 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:21:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:31,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129161002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:31,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:31,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:21:31,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369477405] [2021-07-13 20:21:31,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:21:31,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:31,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:21:31,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:21:31,915 INFO L87 Difference]: Start difference. First operand 2950 states and 9724 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:32,755 INFO L93 Difference]: Finished difference Result 3677 states and 11946 transitions. [2021-07-13 20:21:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:21:32,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:32,761 INFO L225 Difference]: With dead ends: 3677 [2021-07-13 20:21:32,761 INFO L226 Difference]: Without dead ends: 3662 [2021-07-13 20:21:32,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 801.9ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:21:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2021-07-13 20:21:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 2962. [2021-07-13 20:21:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 3.2971968929415736) internal successors, (9763), 2961 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 9763 transitions. [2021-07-13 20:21:32,801 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 9763 transitions. Word has length 30 [2021-07-13 20:21:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:32,801 INFO L482 AbstractCegarLoop]: Abstraction has 2962 states and 9763 transitions. [2021-07-13 20:21:32,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 9763 transitions. [2021-07-13 20:21:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:32,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:32,805 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:33,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-07-13 20:21:33,006 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:33,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2120947529, now seen corresponding path program 17 times [2021-07-13 20:21:33,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:33,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454955634] [2021-07-13 20:21:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:33,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:33,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454955634] [2021-07-13 20:21:33,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454955634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:33,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760211682] [2021-07-13 20:21:33,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:33,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:21:33,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:33,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:21:33,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:33,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:21:33,607 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:33,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:21:33,617 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:33,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:33,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:33,629 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 [2021-07-13 20:21:33,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:33,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:33,639 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. [2021-07-13 20:21:33,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:21:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:33,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760211682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:33,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:33,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:21:33,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247222829] [2021-07-13 20:21:33,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:21:33,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:33,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:21:33,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:21:33,655 INFO L87 Difference]: Start difference. First operand 2962 states and 9763 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:35,321 INFO L93 Difference]: Finished difference Result 3790 states and 12239 transitions. [2021-07-13 20:21:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:21:35,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:35,329 INFO L225 Difference]: With dead ends: 3790 [2021-07-13 20:21:35,329 INFO L226 Difference]: Without dead ends: 3775 [2021-07-13 20:21:35,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1547.7ms TimeCoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:21:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-07-13 20:21:35,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2971. [2021-07-13 20:21:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2970 states have (on average 3.299326599326599) internal successors, (9799), 2970 states have internal predecessors, (9799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 9799 transitions. [2021-07-13 20:21:35,388 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 9799 transitions. Word has length 30 [2021-07-13 20:21:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:35,389 INFO L482 AbstractCegarLoop]: Abstraction has 2971 states and 9799 transitions. [2021-07-13 20:21:35,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 9799 transitions. [2021-07-13 20:21:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:35,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:35,392 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:35,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2021-07-13 20:21:35,593 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:35,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:35,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2051870483, now seen corresponding path program 18 times [2021-07-13 20:21:35,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:35,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234712722] [2021-07-13 20:21:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:35,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234712722] [2021-07-13 20:21:35,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234712722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:35,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033811403] [2021-07-13 20:21:35,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:35,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:21:35,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:35,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:21:35,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:36,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:36,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:21:36,262 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:36,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:36,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:36,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:21:36,335 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:36,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:36,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:36,377 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 [2021-07-13 20:21:36,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:21:36,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:36,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:36,459 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:52, output treesize:125 [2021-07-13 20:21:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:36,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033811403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:36,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:36,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-07-13 20:21:36,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728108968] [2021-07-13 20:21:36,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:36,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:36,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:36,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:36,614 INFO L87 Difference]: Start difference. First operand 2971 states and 9799 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) [2021-07-13 20:21:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:39,249 INFO L93 Difference]: Finished difference Result 4131 states and 13257 transitions. [2021-07-13 20:21:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:21:39,249 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 [2021-07-13 20:21:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:39,257 INFO L225 Difference]: With dead ends: 4131 [2021-07-13 20:21:39,257 INFO L226 Difference]: Without dead ends: 4097 [2021-07-13 20:21:39,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 2259.2ms TimeCoverageRelationStatistics Valid=400, Invalid=3760, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:21:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-07-13 20:21:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 2977. [2021-07-13 20:21:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.301747311827957) internal successors, (9826), 2976 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) [2021-07-13 20:21:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9826 transitions. [2021-07-13 20:21:39,305 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9826 transitions. Word has length 30 [2021-07-13 20:21:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:39,305 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 9826 transitions. [2021-07-13 20:21:39,305 INFO L483 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) [2021-07-13 20:21:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9826 transitions. [2021-07-13 20:21:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:39,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:39,309 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:39,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:39,510 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:39,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1768820973, now seen corresponding path program 19 times [2021-07-13 20:21:39,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:39,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666921248] [2021-07-13 20:21:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:39,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:39,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666921248] [2021-07-13 20:21:39,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666921248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:39,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534808055] [2021-07-13 20:21:39,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:39,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:21:39,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:39,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:39,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:39,978 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 [2021-07-13 20:21:39,996 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:40,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:40,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:40,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:40,016 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 [2021-07-13 20:21:40,032 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:40,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:40,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:40,064 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 [2021-07-13 20:21:40,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:21:40,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:40,142 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. [2021-07-13 20:21:40,142 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-07-13 20:21:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:40,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534808055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:40,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:40,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:21:40,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119715630] [2021-07-13 20:21:40,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:21:40,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:40,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:21:40,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:21:40,186 INFO L87 Difference]: Start difference. First operand 2977 states and 9826 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:41,311 INFO L93 Difference]: Finished difference Result 4309 states and 13904 transitions. [2021-07-13 20:21:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:21:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:41,319 INFO L225 Difference]: With dead ends: 4309 [2021-07-13 20:21:41,319 INFO L226 Difference]: Without dead ends: 4294 [2021-07-13 20:21:41,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1061.1ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:21:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-07-13 20:21:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 2977. [2021-07-13 20:21:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.301747311827957) internal successors, (9826), 2976 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) [2021-07-13 20:21:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9826 transitions. [2021-07-13 20:21:41,368 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9826 transitions. Word has length 30 [2021-07-13 20:21:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:41,368 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 9826 transitions. [2021-07-13 20:21:41,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9826 transitions. [2021-07-13 20:21:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:41,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:41,371 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:41,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-07-13 20:21:41,572 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1143205165, now seen corresponding path program 20 times [2021-07-13 20:21:41,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:41,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145794649] [2021-07-13 20:21:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:41,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:41,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145794649] [2021-07-13 20:21:41,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145794649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:41,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338880225] [2021-07-13 20:21:41,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:41,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:41,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:41,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:21:41,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:42,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:42,060 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 [2021-07-13 20:21:42,094 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:42,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:42,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:42,121 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 [2021-07-13 20:21:42,166 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:42,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:42,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:42,209 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 [2021-07-13 20:21:42,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:21:42,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:42,362 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. [2021-07-13 20:21:42,362 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:488 [2021-07-13 20:21:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:42,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338880225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:42,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:42,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:21:42,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72906860] [2021-07-13 20:21:42,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:21:42,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:21:42,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:21:42,538 INFO L87 Difference]: Start difference. First operand 2977 states and 9826 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:45,835 INFO L93 Difference]: Finished difference Result 4831 states and 15358 transitions. [2021-07-13 20:21:45,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:21:45,836 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:45,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:45,844 INFO L225 Difference]: With dead ends: 4831 [2021-07-13 20:21:45,844 INFO L226 Difference]: Without dead ends: 4797 [2021-07-13 20:21:45,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 2765.9ms TimeCoverageRelationStatistics Valid=560, Invalid=3996, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:21:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-07-13 20:21:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 2999. [2021-07-13 20:21:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 3.3102068045363575) internal successors, (9924), 2998 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 9924 transitions. [2021-07-13 20:21:45,900 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 9924 transitions. Word has length 30 [2021-07-13 20:21:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:45,900 INFO L482 AbstractCegarLoop]: Abstraction has 2999 states and 9924 transitions. [2021-07-13 20:21:45,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 9924 transitions. [2021-07-13 20:21:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:45,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:45,904 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:46,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-13 20:21:46,113 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:46,113 INFO L82 PathProgramCache]: Analyzing trace with hash 468442303, now seen corresponding path program 21 times [2021-07-13 20:21:46,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:46,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064533690] [2021-07-13 20:21:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:46,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:46,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064533690] [2021-07-13 20:21:46,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064533690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:46,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695048530] [2021-07-13 20:21:46,520 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 [2021-07-13 20:21:46,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:21:46,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:46,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:21:46,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:48,446 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 20:21:48,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:48,470 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 [2021-07-13 20:21:48,578 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:48,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:48,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:48,621 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 [2021-07-13 20:21:48,683 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:21:48,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:48,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:48,740 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 [2021-07-13 20:21:48,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:21:48,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:48,919 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 7 xjuncts. [2021-07-13 20:21:48,919 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:61, output treesize:345 [2021-07-13 20:21:49,146 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-07-13 20:21:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:49,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695048530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:49,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:49,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 20:21:49,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672662150] [2021-07-13 20:21:49,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:21:49,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:49,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:21:49,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:21:49,273 INFO L87 Difference]: Start difference. First operand 2999 states and 9924 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,469 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-07-13 20:21:58,920 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2021-07-13 20:21:59,060 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-07-13 20:21:59,952 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-07-13 20:22:01,896 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-07-13 20:22:07,377 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-07-13 20:22:10,943 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-07-13 20:22:15,281 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 20:22:16,609 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-13 20:22:18,963 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-07-13 20:22:24,011 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-07-13 20:22:28,221 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-13 20:22:31,012 WARN L205 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-07-13 20:22:33,685 WARN L205 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-13 20:22:33,903 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-07-13 20:22:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:36,210 INFO L93 Difference]: Finished difference Result 4802 states and 15302 transitions. [2021-07-13 20:22:36,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:22:36,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:36,219 INFO L225 Difference]: With dead ends: 4802 [2021-07-13 20:22:36,219 INFO L226 Difference]: Without dead ends: 4772 [2021-07-13 20:22:36,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 28906.3ms TimeCoverageRelationStatistics Valid=758, Invalid=3653, Unknown=11, NotChecked=0, Total=4422 [2021-07-13 20:22:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-07-13 20:22:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 2992. [2021-07-13 20:22:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 3.307255098629221) internal successors, (9892), 2991 states have internal predecessors, (9892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 9892 transitions. [2021-07-13 20:22:36,281 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 9892 transitions. Word has length 30 [2021-07-13 20:22:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:36,281 INFO L482 AbstractCegarLoop]: Abstraction has 2992 states and 9892 transitions. [2021-07-13 20:22:36,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 9892 transitions. [2021-07-13 20:22:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:36,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:36,285 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:36,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-07-13 20:22:36,485 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:36,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:36,486 INFO L82 PathProgramCache]: Analyzing trace with hash -472256647, now seen corresponding path program 22 times [2021-07-13 20:22:36,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:36,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247379384] [2021-07-13 20:22:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:36,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:36,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247379384] [2021-07-13 20:22:36,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247379384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:36,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830598341] [2021-07-13 20:22:36,740 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 [2021-07-13 20:22:36,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:36,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:22:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:36,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:36,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:36,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:22:36,938 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:36,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:36,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:36,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:36,955 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 [2021-07-13 20:22:36,971 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:36,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:37,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:37,003 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 [2021-07-13 20:22:37,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:22:37,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:37,059 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. [2021-07-13 20:22:37,059 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-07-13 20:22:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:37,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830598341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:37,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:37,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:22:37,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93553948] [2021-07-13 20:22:37,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:22:37,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:37,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:22:37,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:22:37,101 INFO L87 Difference]: Start difference. First operand 2992 states and 9892 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:38,037 INFO L93 Difference]: Finished difference Result 4333 states and 13973 transitions. [2021-07-13 20:22:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:22:38,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:38,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:38,044 INFO L225 Difference]: With dead ends: 4333 [2021-07-13 20:22:38,044 INFO L226 Difference]: Without dead ends: 4308 [2021-07-13 20:22:38,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 766.6ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:22:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2021-07-13 20:22:38,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 2983. [2021-07-13 20:22:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 3.3031522468142187) internal successors, (9850), 2982 states have internal predecessors, (9850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 9850 transitions. [2021-07-13 20:22:38,093 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 9850 transitions. Word has length 30 [2021-07-13 20:22:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:38,093 INFO L482 AbstractCegarLoop]: Abstraction has 2983 states and 9850 transitions. [2021-07-13 20:22:38,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 9850 transitions. [2021-07-13 20:22:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:38,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:38,097 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:38,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-07-13 20:22:38,298 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:38,299 INFO L82 PathProgramCache]: Analyzing trace with hash -111158881, now seen corresponding path program 23 times [2021-07-13 20:22:38,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:38,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724361842] [2021-07-13 20:22:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:38,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:38,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724361842] [2021-07-13 20:22:38,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724361842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:38,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136959243] [2021-07-13 20:22:38,597 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 [2021-07-13 20:22:38,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:22:38,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:38,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:38,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:38,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:38,786 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 [2021-07-13 20:22:38,821 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:38,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:38,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:38,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:38,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:22:38,871 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:38,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:38,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:38,902 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 [2021-07-13 20:22:38,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:22:38,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:38,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:38,975 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:26 [2021-07-13 20:22:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:39,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136959243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:39,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:39,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:22:39,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196625179] [2021-07-13 20:22:39,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:39,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:39,022 INFO L87 Difference]: Start difference. First operand 2983 states and 9850 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:40,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:40,492 INFO L93 Difference]: Finished difference Result 4532 states and 14620 transitions. [2021-07-13 20:22:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:22:40,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:40,499 INFO L225 Difference]: With dead ends: 4532 [2021-07-13 20:22:40,499 INFO L226 Difference]: Without dead ends: 4482 [2021-07-13 20:22:40,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1212.9ms TimeCoverageRelationStatistics Valid=304, Invalid=2146, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:22:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2021-07-13 20:22:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 2977. [2021-07-13 20:22:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.302755376344086) internal successors, (9829), 2976 states have internal predecessors, (9829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9829 transitions. [2021-07-13 20:22:40,546 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9829 transitions. Word has length 30 [2021-07-13 20:22:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:40,546 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 9829 transitions. [2021-07-13 20:22:40,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:40,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9829 transitions. [2021-07-13 20:22:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:40,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:40,550 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:40,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:40,750 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:40,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:40,751 INFO L82 PathProgramCache]: Analyzing trace with hash 947471975, now seen corresponding path program 24 times [2021-07-13 20:22:40,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:40,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496184069] [2021-07-13 20:22:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:41,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:41,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496184069] [2021-07-13 20:22:41,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496184069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:41,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479113530] [2021-07-13 20:22:41,052 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 [2021-07-13 20:22:41,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:22:41,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:41,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:41,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:41,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:41,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:41,222 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 [2021-07-13 20:22:41,239 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:41,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:41,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:41,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:41,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:22:41,272 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:41,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:41,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:41,301 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 [2021-07-13 20:22:41,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:22:41,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:41,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:41,356 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-07-13 20:22:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:41,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479113530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:41,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:41,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:22:41,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292502330] [2021-07-13 20:22:41,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:41,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:41,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:41,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:41,410 INFO L87 Difference]: Start difference. First operand 2977 states and 9829 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:42,802 INFO L93 Difference]: Finished difference Result 4246 states and 13807 transitions. [2021-07-13 20:22:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:22:42,802 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:42,809 INFO L225 Difference]: With dead ends: 4246 [2021-07-13 20:22:42,809 INFO L226 Difference]: Without dead ends: 4221 [2021-07-13 20:22:42,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1299.2ms TimeCoverageRelationStatistics Valid=372, Invalid=2280, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:22:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-07-13 20:22:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 2974. [2021-07-13 20:22:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2973 states have (on average 3.3030608812647158) internal successors, (9820), 2973 states have internal predecessors, (9820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 9820 transitions. [2021-07-13 20:22:42,867 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 9820 transitions. Word has length 30 [2021-07-13 20:22:42,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:42,867 INFO L482 AbstractCegarLoop]: Abstraction has 2974 states and 9820 transitions. [2021-07-13 20:22:42,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:42,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 9820 transitions. [2021-07-13 20:22:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:42,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:42,871 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:43,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:43,072 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash 255536197, now seen corresponding path program 25 times [2021-07-13 20:22:43,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:43,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814377188] [2021-07-13 20:22:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:43,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814377188] [2021-07-13 20:22:43,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814377188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434199736] [2021-07-13 20:22:43,365 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 [2021-07-13 20:22:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:43,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:22:43,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:43,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:43,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:22:43,577 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:43,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:43,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:43,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:22:43,586 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:43,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:43,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:43,597 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 [2021-07-13 20:22:43,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:43,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:43,607 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. [2021-07-13 20:22:43,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:22:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:43,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434199736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:43,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:43,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:22:43,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923110598] [2021-07-13 20:22:43,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:22:43,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:43,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:22:43,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:22:43,622 INFO L87 Difference]: Start difference. First operand 2974 states and 9820 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:44,748 INFO L93 Difference]: Finished difference Result 3865 states and 12530 transitions. [2021-07-13 20:22:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:22:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:44,755 INFO L225 Difference]: With dead ends: 3865 [2021-07-13 20:22:44,755 INFO L226 Difference]: Without dead ends: 3844 [2021-07-13 20:22:44,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1001.7ms TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:22:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-07-13 20:22:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 2998. [2021-07-13 20:22:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.300633967300634) internal successors, (9892), 2997 states have internal predecessors, (9892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 9892 transitions. [2021-07-13 20:22:44,795 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 9892 transitions. Word has length 30 [2021-07-13 20:22:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:44,795 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 9892 transitions. [2021-07-13 20:22:44,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 9892 transitions. [2021-07-13 20:22:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:44,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:44,798 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:44,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:44,999 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:44,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1899460529, now seen corresponding path program 26 times [2021-07-13 20:22:44,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:44,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305807835] [2021-07-13 20:22:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:45,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:45,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305807835] [2021-07-13 20:22:45,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305807835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345179201] [2021-07-13 20:22:45,311 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 [2021-07-13 20:22:45,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:22:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:45,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:45,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:45,537 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 [2021-07-13 20:22:45,553 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:45,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:45,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:45,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:45,571 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 [2021-07-13 20:22:45,588 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:45,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:45,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:45,636 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 [2021-07-13 20:22:45,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:22:45,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:45,698 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. [2021-07-13 20:22:45,699 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:40 [2021-07-13 20:22:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:45,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345179201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:45,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:45,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:22:45,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414897953] [2021-07-13 20:22:45,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:45,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:45,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:45,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:45,747 INFO L87 Difference]: Start difference. First operand 2998 states and 9892 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:47,451 INFO L93 Difference]: Finished difference Result 4126 states and 13340 transitions. [2021-07-13 20:22:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:22:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:47,459 INFO L225 Difference]: With dead ends: 4126 [2021-07-13 20:22:47,459 INFO L226 Difference]: Without dead ends: 4078 [2021-07-13 20:22:47,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1310.8ms TimeCoverageRelationStatistics Valid=306, Invalid=2346, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:22:47,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-07-13 20:22:47,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3013. [2021-07-13 20:22:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 3.300132802124834) internal successors, (9940), 3012 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 9940 transitions. [2021-07-13 20:22:47,504 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 9940 transitions. Word has length 30 [2021-07-13 20:22:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:47,504 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 9940 transitions. [2021-07-13 20:22:47,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 9940 transitions. [2021-07-13 20:22:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:47,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:47,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:47,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:47,708 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1021832757, now seen corresponding path program 27 times [2021-07-13 20:22:47,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:47,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380358458] [2021-07-13 20:22:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:47,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:47,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380358458] [2021-07-13 20:22:47,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380358458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:47,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199855699] [2021-07-13 20:22:47,985 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 [2021-07-13 20:22:48,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:22:48,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:22:48,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:48,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:48,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:22:48,181 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:48,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:48,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:48,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:22:48,250 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:48,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:48,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:48,292 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 [2021-07-13 20:22:48,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:22:48,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:48,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:48,414 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:71 [2021-07-13 20:22:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:48,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199855699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:48,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:48,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-07-13 20:22:48,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347553727] [2021-07-13 20:22:48,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:22:48,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:48,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:22:48,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:22:48,605 INFO L87 Difference]: Start difference. First operand 3013 states and 9940 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:49,943 INFO L93 Difference]: Finished difference Result 4330 states and 13993 transitions. [2021-07-13 20:22:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:22:49,943 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:49,950 INFO L225 Difference]: With dead ends: 4330 [2021-07-13 20:22:49,950 INFO L226 Difference]: Without dead ends: 4280 [2021-07-13 20:22:49,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1267.3ms TimeCoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:22:49,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2021-07-13 20:22:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 3038. [2021-07-13 20:22:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 3.296674349687191) internal successors, (10012), 3037 states have internal predecessors, (10012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 10012 transitions. [2021-07-13 20:22:49,993 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 10012 transitions. Word has length 30 [2021-07-13 20:22:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:49,994 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 10012 transitions. [2021-07-13 20:22:49,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 10012 transitions. [2021-07-13 20:22:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:49,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:49,997 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:50,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable836 [2021-07-13 20:22:50,198 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 825383695, now seen corresponding path program 28 times [2021-07-13 20:22:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:50,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543098358] [2021-07-13 20:22:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:50,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:50,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543098358] [2021-07-13 20:22:50,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543098358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:50,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951455727] [2021-07-13 20:22:50,501 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:50,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:50,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:50,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:22:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:51,399 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-07-13 20:22:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:51,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:51,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-07-13 20:22:51,413 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:51,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:51,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:51,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:51,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 40 [2021-07-13 20:22:51,425 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:51,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:51,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:51,438 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 40 treesize of output 28 [2021-07-13 20:22:51,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:51,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:51,449 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. [2021-07-13 20:22:51,449 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:7 [2021-07-13 20:22:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:51,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951455727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:51,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:51,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:22:51,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828485307] [2021-07-13 20:22:51,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:22:51,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:51,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:22:51,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:22:51,470 INFO L87 Difference]: Start difference. First operand 3038 states and 10012 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:53,666 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-07-13 20:22:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:54,677 INFO L93 Difference]: Finished difference Result 3212 states and 10480 transitions. [2021-07-13 20:22:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:22:54,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:54,683 INFO L225 Difference]: With dead ends: 3212 [2021-07-13 20:22:54,683 INFO L226 Difference]: Without dead ends: 3193 [2021-07-13 20:22:54,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 3016.3ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-07-13 20:22:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 3046. [2021-07-13 20:22:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.295894909688013) internal successors, (10036), 3045 states have internal predecessors, (10036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 10036 transitions. [2021-07-13 20:22:54,724 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 10036 transitions. Word has length 30 [2021-07-13 20:22:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:54,724 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 10036 transitions. [2021-07-13 20:22:54,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 10036 transitions. [2021-07-13 20:22:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:54,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:54,728 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:54,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:54,928 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1670580273, now seen corresponding path program 29 times [2021-07-13 20:22:54,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:54,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398306978] [2021-07-13 20:22:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:55,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:55,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398306978] [2021-07-13 20:22:55,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398306978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:55,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981144373] [2021-07-13 20:22:55,203 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:55,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:22:55,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:55,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:55,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:55,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:22:55,440 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:55,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:55,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:55,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:22:55,526 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:55,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:55,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:55,593 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 [2021-07-13 20:22:55,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:22:55,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:55,702 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. [2021-07-13 20:22:55,702 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:82 [2021-07-13 20:22:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:55,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981144373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:55,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:55,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:22:55,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664482540] [2021-07-13 20:22:55,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:22:55,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:22:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:22:55,830 INFO L87 Difference]: Start difference. First operand 3046 states and 10036 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:57,151 INFO L93 Difference]: Finished difference Result 4508 states and 14544 transitions. [2021-07-13 20:22:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:22:57,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:57,160 INFO L225 Difference]: With dead ends: 4508 [2021-07-13 20:22:57,160 INFO L226 Difference]: Without dead ends: 4483 [2021-07-13 20:22:57,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1236.7ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:22:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2021-07-13 20:22:57,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 3095. [2021-07-13 20:22:57,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3094 states have (on average 3.2937944408532642) internal successors, (10191), 3094 states have internal predecessors, (10191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 10191 transitions. [2021-07-13 20:22:57,211 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 10191 transitions. Word has length 30 [2021-07-13 20:22:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:57,211 INFO L482 AbstractCegarLoop]: Abstraction has 3095 states and 10191 transitions. [2021-07-13 20:22:57,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 10191 transitions. [2021-07-13 20:22:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:57,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:57,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:57,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:57,416 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:57,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1765440369, now seen corresponding path program 30 times [2021-07-13 20:22:57,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:57,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674934715] [2021-07-13 20:22:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:57,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:57,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674934715] [2021-07-13 20:22:57,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674934715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:57,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217972077] [2021-07-13 20:22:57,762 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:57,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:22:57,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:57,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:57,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:57,957 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 [2021-07-13 20:22:57,974 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:57,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:57,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:57,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:57,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:22:58,007 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:22:58,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:58,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:58,037 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 [2021-07-13 20:22:58,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:22:58,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:58,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:58,093 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-07-13 20:22:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:58,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217972077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:58,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:58,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:22:58,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773095363] [2021-07-13 20:22:58,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:58,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:58,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:58,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:58,151 INFO L87 Difference]: Start difference. First operand 3095 states and 10191 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:59,493 INFO L93 Difference]: Finished difference Result 4219 states and 13699 transitions. [2021-07-13 20:22:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:22:59,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:59,502 INFO L225 Difference]: With dead ends: 4219 [2021-07-13 20:22:59,502 INFO L226 Difference]: Without dead ends: 4194 [2021-07-13 20:22:59,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1238.9ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:22:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-07-13 20:22:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3103. [2021-07-13 20:22:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.293036750483559) internal successors, (10215), 3102 states have internal predecessors, (10215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 10215 transitions. [2021-07-13 20:22:59,564 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 10215 transitions. Word has length 30 [2021-07-13 20:22:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:59,564 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 10215 transitions. [2021-07-13 20:22:59,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 10215 transitions. [2021-07-13 20:22:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:59,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:59,568 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:59,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:59,769 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 879258491, now seen corresponding path program 31 times [2021-07-13 20:22:59,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:59,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093687556] [2021-07-13 20:22:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:00,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:00,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093687556] [2021-07-13 20:23:00,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093687556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:00,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855799150] [2021-07-13 20:23:00,054 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:23:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:00,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:00,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:00,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:00,236 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 [2021-07-13 20:23:00,253 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:00,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:00,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:00,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:00,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:00,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:00,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:00,272 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 [2021-07-13 20:23:00,295 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:00,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:00,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:00,331 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 [2021-07-13 20:23:00,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:23:00,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:00,404 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. [2021-07-13 20:23:00,405 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:28 [2021-07-13 20:23:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:00,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855799150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:00,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:00,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:23:00,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451273841] [2021-07-13 20:23:00,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:23:00,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:23:00,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:23:00,480 INFO L87 Difference]: Start difference. First operand 3103 states and 10215 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:01,604 INFO L93 Difference]: Finished difference Result 4326 states and 14033 transitions. [2021-07-13 20:23:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:23:01,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:01,612 INFO L225 Difference]: With dead ends: 4326 [2021-07-13 20:23:01,612 INFO L226 Difference]: Without dead ends: 4301 [2021-07-13 20:23:01,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 970.4ms TimeCoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:23:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-07-13 20:23:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3103. [2021-07-13 20:23:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.293036750483559) internal successors, (10215), 3102 states have internal predecessors, (10215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 10215 transitions. [2021-07-13 20:23:01,663 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 10215 transitions. Word has length 30 [2021-07-13 20:23:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:01,663 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 10215 transitions. [2021-07-13 20:23:01,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 10215 transitions. [2021-07-13 20:23:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:01,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:01,667 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:01,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-07-13 20:23:01,868 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:01,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2131402188, now seen corresponding path program 44 times [2021-07-13 20:23:01,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:01,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802096228] [2021-07-13 20:23:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:02,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:02,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802096228] [2021-07-13 20:23:02,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802096228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:02,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142482519] [2021-07-13 20:23:02,226 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:02,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:23:02,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:02,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:23:02,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:02,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:02,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:02,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:02,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:02,447 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 [2021-07-13 20:23:02,449 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:02,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:02,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:02,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:02,458 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 [2021-07-13 20:23:02,460 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:02,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:02,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:02,471 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 [2021-07-13 20:23:02,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:02,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:02,481 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. [2021-07-13 20:23:02,481 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:23:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:02,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142482519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:02,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:02,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:23:02,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641343334] [2021-07-13 20:23:02,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:23:02,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:02,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:23:02,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:23:02,503 INFO L87 Difference]: Start difference. First operand 3103 states and 10215 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:04,283 INFO L93 Difference]: Finished difference Result 4106 states and 13120 transitions. [2021-07-13 20:23:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:23:04,284 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:04,291 INFO L225 Difference]: With dead ends: 4106 [2021-07-13 20:23:04,291 INFO L226 Difference]: Without dead ends: 4080 [2021-07-13 20:23:04,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1608.5ms TimeCoverageRelationStatistics Valid=463, Invalid=2729, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:23:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2021-07-13 20:23:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 3097. [2021-07-13 20:23:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 3096 states have (on average 3.294573643410853) internal successors, (10200), 3096 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 10200 transitions. [2021-07-13 20:23:04,336 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 10200 transitions. Word has length 30 [2021-07-13 20:23:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:04,336 INFO L482 AbstractCegarLoop]: Abstraction has 3097 states and 10200 transitions. [2021-07-13 20:23:04,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 10200 transitions. [2021-07-13 20:23:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:04,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:04,341 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:04,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:04,541 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1986525082, now seen corresponding path program 45 times [2021-07-13 20:23:04,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:04,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225592305] [2021-07-13 20:23:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:04,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:04,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225592305] [2021-07-13 20:23:04,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225592305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:04,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942677469] [2021-07-13 20:23:04,877 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:04,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:23:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:23:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:05,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:05,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:05,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:05,165 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 [2021-07-13 20:23:05,251 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:05,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:05,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:05,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:05,287 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 [2021-07-13 20:23:05,364 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:05,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:05,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:05,434 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 [2021-07-13 20:23:05,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:23:06,069 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2021-07-13 20:23:06,070 INFO L628 ElimStorePlain]: treesize reduction 900, result has 54.5 percent of original size [2021-07-13 20:23:06,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:06,327 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:56, output treesize:54 [2021-07-13 20:23:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:06,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942677469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:06,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:06,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:23:06,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646398488] [2021-07-13 20:23:06,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:23:06,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:06,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:23:06,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:23:06,429 INFO L87 Difference]: Start difference. First operand 3097 states and 10200 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:09,204 INFO L93 Difference]: Finished difference Result 4278 states and 13633 transitions. [2021-07-13 20:23:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:23:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:09,212 INFO L225 Difference]: With dead ends: 4278 [2021-07-13 20:23:09,212 INFO L226 Difference]: Without dead ends: 4237 [2021-07-13 20:23:09,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 2238.7ms TimeCoverageRelationStatistics Valid=557, Invalid=4845, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:23:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-07-13 20:23:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3137. [2021-07-13 20:23:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 3.2901785714285716) internal successors, (10318), 3136 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 10318 transitions. [2021-07-13 20:23:09,259 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 10318 transitions. Word has length 30 [2021-07-13 20:23:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:09,259 INFO L482 AbstractCegarLoop]: Abstraction has 3137 states and 10318 transitions. [2021-07-13 20:23:09,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 10318 transitions. [2021-07-13 20:23:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:09,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:09,264 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:09,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-07-13 20:23:09,464 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:09,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2024287664, now seen corresponding path program 46 times [2021-07-13 20:23:09,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:09,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560500354] [2021-07-13 20:23:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:09,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:09,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560500354] [2021-07-13 20:23:09,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560500354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:09,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782219833] [2021-07-13 20:23:09,793 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:09,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:23:09,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:23:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:11,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:11,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:11,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-13 20:23:11,496 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:11,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:11,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:11,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:11,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:11,507 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 [2021-07-13 20:23:11,508 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:11,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:11,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:11,533 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 [2021-07-13 20:23:11,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:11,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:11,544 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. [2021-07-13 20:23:11,544 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:23:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:11,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782219833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:11,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:11,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 20:23:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373390284] [2021-07-13 20:23:11,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:23:11,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:23:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=383, Unknown=2, NotChecked=0, Total=462 [2021-07-13 20:23:11,564 INFO L87 Difference]: Start difference. First operand 3137 states and 10318 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) [2021-07-13 20:23:28,223 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-07-13 20:23:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:35,537 INFO L93 Difference]: Finished difference Result 4277 states and 13788 transitions. [2021-07-13 20:23:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:23:35,538 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 [2021-07-13 20:23:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:35,544 INFO L225 Difference]: With dead ends: 4277 [2021-07-13 20:23:35,544 INFO L226 Difference]: Without dead ends: 4251 [2021-07-13 20:23:35,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 17449.4ms TimeCoverageRelationStatistics Valid=517, Invalid=3004, Unknown=19, NotChecked=0, Total=3540 [2021-07-13 20:23:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-07-13 20:23:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3157. [2021-07-13 20:23:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.285171102661597) internal successors, (10368), 3156 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 10368 transitions. [2021-07-13 20:23:35,589 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 10368 transitions. Word has length 30 [2021-07-13 20:23:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:35,589 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 10368 transitions. [2021-07-13 20:23:35,589 INFO L483 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) [2021-07-13 20:23:35,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 10368 transitions. [2021-07-13 20:23:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:35,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:35,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:35,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-07-13 20:23:35,794 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash -695963646, now seen corresponding path program 47 times [2021-07-13 20:23:35,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:35,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517293702] [2021-07-13 20:23:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:36,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:36,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517293702] [2021-07-13 20:23:36,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517293702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:36,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899246604] [2021-07-13 20:23:36,123 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:36,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:23:36,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:23:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:36,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:36,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:36,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:36,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:36,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:23:36,372 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:36,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:36,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:36,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:36,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:36,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:36,381 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 [2021-07-13 20:23:36,383 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:36,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:36,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:36,394 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 [2021-07-13 20:23:36,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:36,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:36,404 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. [2021-07-13 20:23:36,404 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:23:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:36,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899246604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:36,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:36,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:23:36,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609679041] [2021-07-13 20:23:36,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:23:36,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:36,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:23:36,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:23:36,420 INFO L87 Difference]: Start difference. First operand 3157 states and 10368 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) [2021-07-13 20:23:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:38,609 INFO L93 Difference]: Finished difference Result 4084 states and 13096 transitions. [2021-07-13 20:23:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:23:38,609 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 [2021-07-13 20:23:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:38,615 INFO L225 Difference]: With dead ends: 4084 [2021-07-13 20:23:38,615 INFO L226 Difference]: Without dead ends: 4058 [2021-07-13 20:23:38,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2013.1ms TimeCoverageRelationStatistics Valid=546, Invalid=3360, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:23:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-07-13 20:23:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 3157. [2021-07-13 20:23:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.285171102661597) internal successors, (10368), 3156 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 10368 transitions. [2021-07-13 20:23:38,659 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 10368 transitions. Word has length 30 [2021-07-13 20:23:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:38,659 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 10368 transitions. [2021-07-13 20:23:38,659 INFO L483 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) [2021-07-13 20:23:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 10368 transitions. [2021-07-13 20:23:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:38,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:38,663 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:38,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:38,863 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:38,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1511030885, now seen corresponding path program 32 times [2021-07-13 20:23:38,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:38,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80629807] [2021-07-13 20:23:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:39,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:39,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80629807] [2021-07-13 20:23:39,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80629807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:39,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820465006] [2021-07-13 20:23:39,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:39,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:23:39,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:39,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:23:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:39,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:23:39,511 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:39,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:39,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:39,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:23:39,581 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:39,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:39,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:39,625 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 [2021-07-13 20:23:39,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:23:39,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:39,747 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. [2021-07-13 20:23:39,747 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:153 [2021-07-13 20:23:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:39,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820465006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:39,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:39,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-07-13 20:23:39,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884031380] [2021-07-13 20:23:39,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:23:39,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:39,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:23:39,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:23:39,810 INFO L87 Difference]: Start difference. First operand 3157 states and 10368 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:42,597 INFO L93 Difference]: Finished difference Result 4748 states and 14976 transitions. [2021-07-13 20:23:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:23:42,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:42,605 INFO L225 Difference]: With dead ends: 4748 [2021-07-13 20:23:42,605 INFO L226 Difference]: Without dead ends: 4718 [2021-07-13 20:23:42,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2348.8ms TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:23:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2021-07-13 20:23:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 3186. [2021-07-13 20:23:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.2910518053375197) internal successors, (10482), 3185 states have internal predecessors, (10482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10482 transitions. [2021-07-13 20:23:42,655 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10482 transitions. Word has length 30 [2021-07-13 20:23:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:42,656 INFO L482 AbstractCegarLoop]: Abstraction has 3186 states and 10482 transitions. [2021-07-13 20:23:42,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10482 transitions. [2021-07-13 20:23:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:42,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:42,660 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:42,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-07-13 20:23:42,860 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:42,861 INFO L82 PathProgramCache]: Analyzing trace with hash 871210921, now seen corresponding path program 33 times [2021-07-13 20:23:42,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:42,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274479894] [2021-07-13 20:23:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:43,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:43,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274479894] [2021-07-13 20:23:43,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274479894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:43,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142613911] [2021-07-13 20:23:43,169 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:43,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:23:43,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:43,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:43,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:43,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:43,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:23:43,406 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:43,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:43,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:43,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:43,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:23:43,476 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:43,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:43,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:43,522 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 [2021-07-13 20:23:43,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:23:43,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:43,645 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 6 xjuncts. [2021-07-13 20:23:43,645 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:251 [2021-07-13 20:23:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:43,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142613911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:43,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:43,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:23:43,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620561244] [2021-07-13 20:23:43,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:23:43,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:23:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:23:43,741 INFO L87 Difference]: Start difference. First operand 3186 states and 10482 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:44,043 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-07-13 20:23:46,997 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-07-13 20:23:47,483 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-13 20:23:48,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:48,765 INFO L93 Difference]: Finished difference Result 5204 states and 16501 transitions. [2021-07-13 20:23:48,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:23:48,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:48,774 INFO L225 Difference]: With dead ends: 5204 [2021-07-13 20:23:48,774 INFO L226 Difference]: Without dead ends: 5185 [2021-07-13 20:23:48,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 3423.0ms TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:23:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2021-07-13 20:23:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 3197. [2021-07-13 20:23:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 3.292866082603254) internal successors, (10524), 3196 states have internal predecessors, (10524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10524 transitions. [2021-07-13 20:23:48,832 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10524 transitions. Word has length 30 [2021-07-13 20:23:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:48,832 INFO L482 AbstractCegarLoop]: Abstraction has 3197 states and 10524 transitions. [2021-07-13 20:23:48,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:48,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10524 transitions. [2021-07-13 20:23:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:48,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:48,836 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:49,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1169 [2021-07-13 20:23:49,037 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:49,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1742930817, now seen corresponding path program 34 times [2021-07-13 20:23:49,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:49,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163755085] [2021-07-13 20:23:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:49,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:49,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163755085] [2021-07-13 20:23:49,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163755085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:49,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951861751] [2021-07-13 20:23:49,336 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:49,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:23:49,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:49,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:23:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:49,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:23:49,562 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:49,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:49,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:49,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:23:49,579 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:49,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:49,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:49,590 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 [2021-07-13 20:23:49,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:49,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:49,600 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. [2021-07-13 20:23:49,600 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:23:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:49,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951861751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:49,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:49,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:23:49,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392889680] [2021-07-13 20:23:49,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:23:49,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:49,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:23:49,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:23:49,615 INFO L87 Difference]: Start difference. First operand 3197 states and 10524 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:52,129 INFO L93 Difference]: Finished difference Result 4615 states and 14674 transitions. [2021-07-13 20:23:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:23:52,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:52,137 INFO L225 Difference]: With dead ends: 4615 [2021-07-13 20:23:52,137 INFO L226 Difference]: Without dead ends: 4600 [2021-07-13 20:23:52,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 2140.5ms TimeCoverageRelationStatistics Valid=620, Invalid=2686, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:23:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2021-07-13 20:23:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 3186. [2021-07-13 20:23:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.290423861852433) internal successors, (10480), 3185 states have internal predecessors, (10480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10480 transitions. [2021-07-13 20:23:52,186 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10480 transitions. Word has length 30 [2021-07-13 20:23:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:52,186 INFO L482 AbstractCegarLoop]: Abstraction has 3186 states and 10480 transitions. [2021-07-13 20:23:52,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10480 transitions. [2021-07-13 20:23:52,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:52,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:52,190 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:52,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1226,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:52,391 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:52,391 INFO L82 PathProgramCache]: Analyzing trace with hash 701763704, now seen corresponding path program 48 times [2021-07-13 20:23:52,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:52,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43282733] [2021-07-13 20:23:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:52,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:52,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43282733] [2021-07-13 20:23:52,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43282733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:52,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517899719] [2021-07-13 20:23:52,835 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:52,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:23:52,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:23:52,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:53,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:53,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:53,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:23:53,048 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:53,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:53,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:53,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:53,057 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 [2021-07-13 20:23:53,059 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:53,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:53,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:53,070 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 [2021-07-13 20:23:53,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:53,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:53,081 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. [2021-07-13 20:23:53,081 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:23:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:53,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517899719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:53,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:53,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:23:53,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146079432] [2021-07-13 20:23:53,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:23:53,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:53,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:23:53,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:23:53,100 INFO L87 Difference]: Start difference. First operand 3186 states and 10480 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:55,329 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-07-13 20:23:57,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:57,543 INFO L93 Difference]: Finished difference Result 4817 states and 15194 transitions. [2021-07-13 20:23:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:23:57,544 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:57,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:57,551 INFO L225 Difference]: With dead ends: 4817 [2021-07-13 20:23:57,551 INFO L226 Difference]: Without dead ends: 4788 [2021-07-13 20:23:57,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3231 ImplicationChecksByTransitivity, 3819.9ms TimeCoverageRelationStatistics Valid=1355, Invalid=7765, Unknown=0, NotChecked=0, Total=9120 [2021-07-13 20:23:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2021-07-13 20:23:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 3197. [2021-07-13 20:23:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 3.2947434292866085) internal successors, (10530), 3196 states have internal predecessors, (10530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10530 transitions. [2021-07-13 20:23:57,616 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10530 transitions. Word has length 30 [2021-07-13 20:23:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:57,616 INFO L482 AbstractCegarLoop]: Abstraction has 3197 states and 10530 transitions. [2021-07-13 20:23:57,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10530 transitions. [2021-07-13 20:23:57,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:57,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:57,621 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:57,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-07-13 20:23:57,821 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:57,822 INFO L82 PathProgramCache]: Analyzing trace with hash -597068292, now seen corresponding path program 49 times [2021-07-13 20:23:57,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:57,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346483482] [2021-07-13 20:23:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:58,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:58,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346483482] [2021-07-13 20:23:58,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346483482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:58,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780168854] [2021-07-13 20:23:58,110 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:23:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:58,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:58,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:58,328 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 [2021-07-13 20:23:58,332 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:58,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:58,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:58,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:58,341 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 [2021-07-13 20:23:58,343 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:23:58,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:58,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:58,354 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 [2021-07-13 20:23:58,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:58,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:58,364 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. [2021-07-13 20:23:58,364 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:23:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:58,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780168854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:58,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:58,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-13 20:23:58,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872571094] [2021-07-13 20:23:58,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:23:58,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:58,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:23:58,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:23:58,385 INFO L87 Difference]: Start difference. First operand 3197 states and 10530 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:00,980 INFO L93 Difference]: Finished difference Result 5801 states and 18343 transitions. [2021-07-13 20:24:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:24:00,980 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:00,990 INFO L225 Difference]: With dead ends: 5801 [2021-07-13 20:24:00,990 INFO L226 Difference]: Without dead ends: 5780 [2021-07-13 20:24:00,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 2164.7ms TimeCoverageRelationStatistics Valid=672, Invalid=4158, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:24:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2021-07-13 20:24:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 3340. [2021-07-13 20:24:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 3.2946990116801436) internal successors, (11001), 3339 states have internal predecessors, (11001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 11001 transitions. [2021-07-13 20:24:01,055 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 11001 transitions. Word has length 30 [2021-07-13 20:24:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:01,055 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 11001 transitions. [2021-07-13 20:24:01,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:01,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 11001 transitions. [2021-07-13 20:24:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:01,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:01,060 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:01,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1228,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:01,261 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1176039544, now seen corresponding path program 50 times [2021-07-13 20:24:01,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:01,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202056850] [2021-07-13 20:24:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:01,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:01,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202056850] [2021-07-13 20:24:01,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202056850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:01,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424356237] [2021-07-13 20:24:01,553 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:01,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:24:01,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:01,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:24:01,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:01,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:01,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:01,810 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 [2021-07-13 20:24:01,907 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:01,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:01,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:01,950 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 [2021-07-13 20:24:02,024 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:02,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:02,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:02,090 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 [2021-07-13 20:24:02,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:24:02,791 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2021-07-13 20:24:02,792 INFO L628 ElimStorePlain]: treesize reduction 44, result has 97.8 percent of original size [2021-07-13 20:24:03,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:03,236 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:34 [2021-07-13 20:24:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:03,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424356237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:03,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:03,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:24:03,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311021110] [2021-07-13 20:24:03,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:24:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:03,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:24:03,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:24:03,316 INFO L87 Difference]: Start difference. First operand 3340 states and 11001 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:06,656 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-07-13 20:24:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:08,673 INFO L93 Difference]: Finished difference Result 7449 states and 23005 transitions. [2021-07-13 20:24:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-13 20:24:08,673 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:08,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:08,685 INFO L225 Difference]: With dead ends: 7449 [2021-07-13 20:24:08,685 INFO L226 Difference]: Without dead ends: 7336 [2021-07-13 20:24:08,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 4292.5ms TimeCoverageRelationStatistics Valid=1874, Invalid=9468, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:24:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2021-07-13 20:24:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 3586. [2021-07-13 20:24:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 3.300976290097629) internal successors, (11834), 3585 states have internal predecessors, (11834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 11834 transitions. [2021-07-13 20:24:08,755 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 11834 transitions. Word has length 30 [2021-07-13 20:24:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:08,755 INFO L482 AbstractCegarLoop]: Abstraction has 3586 states and 11834 transitions. [2021-07-13 20:24:08,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 11834 transitions. [2021-07-13 20:24:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:08,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:08,759 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:08,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1229 [2021-07-13 20:24:08,960 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2047112795, now seen corresponding path program 35 times [2021-07-13 20:24:08,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:08,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545747979] [2021-07-13 20:24:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:09,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545747979] [2021-07-13 20:24:09,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545747979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933757786] [2021-07-13 20:24:09,229 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:09,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:24:09,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:09,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:24:09,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:09,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:09,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:09,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:09,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:09,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:24:09,411 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:09,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:09,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:09,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:09,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:09,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:09,432 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 [2021-07-13 20:24:09,447 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:09,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:09,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:09,479 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 [2021-07-13 20:24:09,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:24:09,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:09,547 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. [2021-07-13 20:24:09,547 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:45 [2021-07-13 20:24:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:09,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933757786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:09,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:09,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:24:09,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055023173] [2021-07-13 20:24:09,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:24:09,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:09,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:24:09,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:24:09,610 INFO L87 Difference]: Start difference. First operand 3586 states and 11834 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:11,986 INFO L93 Difference]: Finished difference Result 4765 states and 15502 transitions. [2021-07-13 20:24:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:24:11,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:11,996 INFO L225 Difference]: With dead ends: 4765 [2021-07-13 20:24:11,996 INFO L226 Difference]: Without dead ends: 4740 [2021-07-13 20:24:11,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2022.7ms TimeCoverageRelationStatistics Valid=526, Invalid=2554, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:24:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4740 states. [2021-07-13 20:24:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4740 to 3580. [2021-07-13 20:24:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 3.3017602682313494) internal successors, (11817), 3579 states have internal predecessors, (11817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 11817 transitions. [2021-07-13 20:24:12,053 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 11817 transitions. Word has length 30 [2021-07-13 20:24:12,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:12,053 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 11817 transitions. [2021-07-13 20:24:12,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 11817 transitions. [2021-07-13 20:24:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:12,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:12,058 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:12,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-07-13 20:24:12,258 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:12,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1125030693, now seen corresponding path program 36 times [2021-07-13 20:24:12,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:12,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334049616] [2021-07-13 20:24:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:12,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334049616] [2021-07-13 20:24:12,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334049616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180015308] [2021-07-13 20:24:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:12,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:24:12,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:12,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:24:12,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:12,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:12,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:24:12,738 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:12,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:12,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:12,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:12,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:12,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:24:12,773 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:12,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:12,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:12,804 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 [2021-07-13 20:24:12,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:24:12,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:12,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:12,870 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-07-13 20:24:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180015308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:12,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:12,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:24:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732766457] [2021-07-13 20:24:12,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:24:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:24:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:24:12,927 INFO L87 Difference]: Start difference. First operand 3580 states and 11817 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:15,855 INFO L93 Difference]: Finished difference Result 5143 states and 16713 transitions. [2021-07-13 20:24:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:24:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:15,864 INFO L225 Difference]: With dead ends: 5143 [2021-07-13 20:24:15,864 INFO L226 Difference]: Without dead ends: 5118 [2021-07-13 20:24:15,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2485.7ms TimeCoverageRelationStatistics Valid=730, Invalid=4240, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:24:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-07-13 20:24:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 3590. [2021-07-13 20:24:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 3589 states have (on average 3.3011981053218165) internal successors, (11848), 3589 states have internal predecessors, (11848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 11848 transitions. [2021-07-13 20:24:15,921 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 11848 transitions. Word has length 30 [2021-07-13 20:24:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:15,921 INFO L482 AbstractCegarLoop]: Abstraction has 3590 states and 11848 transitions. [2021-07-13 20:24:15,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 11848 transitions. [2021-07-13 20:24:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:15,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:15,926 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:16,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-07-13 20:24:16,129 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1964181417, now seen corresponding path program 37 times [2021-07-13 20:24:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:16,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045564667] [2021-07-13 20:24:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:16,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:16,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045564667] [2021-07-13 20:24:16,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045564667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:16,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784021668] [2021-07-13 20:24:16,384 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:16,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:24:16,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:16,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:16,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:16,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:24:16,563 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:16,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:16,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:16,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:16,580 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 [2021-07-13 20:24:16,595 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:16,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:16,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:16,625 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 [2021-07-13 20:24:16,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:24:16,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:16,696 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. [2021-07-13 20:24:16,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:28 [2021-07-13 20:24:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:16,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784021668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:16,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:16,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:24:16,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656461095] [2021-07-13 20:24:16,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:24:16,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:16,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:24:16,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:24:16,762 INFO L87 Difference]: Start difference. First operand 3590 states and 11848 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:18,940 INFO L93 Difference]: Finished difference Result 4897 states and 15932 transitions. [2021-07-13 20:24:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:24:18,940 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:18,949 INFO L225 Difference]: With dead ends: 4897 [2021-07-13 20:24:18,949 INFO L226 Difference]: Without dead ends: 4872 [2021-07-13 20:24:18,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1714.7ms TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:24:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-07-13 20:24:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3580. [2021-07-13 20:24:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 3.3017602682313494) internal successors, (11817), 3579 states have internal predecessors, (11817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 11817 transitions. [2021-07-13 20:24:19,006 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 11817 transitions. Word has length 30 [2021-07-13 20:24:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:19,006 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 11817 transitions. [2021-07-13 20:24:19,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 11817 transitions. [2021-07-13 20:24:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:19,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:19,011 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:19,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-07-13 20:24:19,212 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash -602707730, now seen corresponding path program 51 times [2021-07-13 20:24:19,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:19,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628495908] [2021-07-13 20:24:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:19,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:19,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628495908] [2021-07-13 20:24:19,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628495908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:19,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638257078] [2021-07-13 20:24:19,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:19,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:24:19,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:19,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:24:19,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:22,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:22,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:22,948 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 43 treesize of output 67 [2021-07-13 20:24:23,172 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:23,227 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.6 percent of original size [2021-07-13 20:24:23,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:23,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:23,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:23,247 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 35 treesize of output 59 [2021-07-13 20:24:23,459 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:24:23,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:23,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:23,545 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 [2021-07-13 20:24:23,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:24:24,186 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 118 [2021-07-13 20:24:24,187 INFO L628 ElimStorePlain]: treesize reduction 1080, result has 44.8 percent of original size [2021-07-13 20:24:24,649 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 166 [2021-07-13 20:24:25,048 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. [2021-07-13 20:24:25,048 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:620 [2021-07-13 20:24:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:25,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638257078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:25,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:25,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:24:25,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696252794] [2021-07-13 20:24:25,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:24:25,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:25,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:24:25,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=712, Unknown=2, NotChecked=0, Total=812 [2021-07-13 20:24:25,281 INFO L87 Difference]: Start difference. First operand 3580 states and 11817 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) 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) [2021-07-13 20:26:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:09,490 INFO L93 Difference]: Finished difference Result 5047 states and 16046 transitions. [2021-07-13 20:26:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:26:09,490 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) 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 [2021-07-13 20:26:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:09,499 INFO L225 Difference]: With dead ends: 5047 [2021-07-13 20:26:09,499 INFO L226 Difference]: Without dead ends: 5003 [2021-07-13 20:26:09,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 46127.4ms TimeCoverageRelationStatistics Valid=765, Invalid=6020, Unknown=21, NotChecked=0, Total=6806 [2021-07-13 20:26:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2021-07-13 20:26:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 3578. [2021-07-13 20:26:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 3.301090299133352) internal successors, (11808), 3577 states have internal predecessors, (11808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 11808 transitions. [2021-07-13 20:26:09,553 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 11808 transitions. Word has length 30 [2021-07-13 20:26:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:09,553 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 11808 transitions. [2021-07-13 20:26:09,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) 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) [2021-07-13 20:26:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 11808 transitions. [2021-07-13 20:26:09,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:09,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:09,558 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:09,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1434,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:09,758 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:09,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1615788940, now seen corresponding path program 52 times [2021-07-13 20:26:09,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:09,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165464828] [2021-07-13 20:26:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:10,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:10,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165464828] [2021-07-13 20:26:10,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165464828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:10,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123676348] [2021-07-13 20:26:10,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:10,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:26:10,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:10,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:26:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:13,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:13,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:13,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:13,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-13 20:26:13,496 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:26:13,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:13,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:13,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:13,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:13,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:13,505 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 [2021-07-13 20:26:13,507 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:26:13,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:13,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:13,518 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 [2021-07-13 20:26:13,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:13,528 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. [2021-07-13 20:26:13,528 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:26:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:13,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123676348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:13,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:13,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-13 20:26:13,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722329399] [2021-07-13 20:26:13,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:26:13,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:13,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:26:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=386, Unknown=3, NotChecked=0, Total=462 [2021-07-13 20:26:13,549 INFO L87 Difference]: Start difference. First operand 3578 states and 11808 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) [2021-07-13 20:26:53,140 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-07-13 20:26:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:26:53,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1769,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:53,342 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:173) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:847) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:761) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 55 more [2021-07-13 20:26:53,345 INFO L168 Benchmark]: Toolchain (without parser) took 469832.49 ms. Allocated memory was 210.8 MB in the beginning and 594.5 MB in the end (delta: 383.8 MB). Free memory was 190.6 MB in the beginning and 330.7 MB in the end (delta: -140.1 MB). Peak memory consumption was 244.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:26:53,346 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 210.8 MB. Free memory is still 191.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:26:53,346 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.75 ms. Allocated memory is still 210.8 MB. Free memory was 190.4 MB in the beginning and 188.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:26:53,346 INFO L168 Benchmark]: Boogie Preprocessor took 19.52 ms. Allocated memory is still 210.8 MB. Free memory was 188.9 MB in the beginning and 187.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:26:53,346 INFO L168 Benchmark]: RCFGBuilder took 243.98 ms. Allocated memory is still 210.8 MB. Free memory was 187.9 MB in the beginning and 176.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:26:53,346 INFO L168 Benchmark]: TraceAbstraction took 469543.79 ms. Allocated memory was 210.8 MB in the beginning and 594.5 MB in the end (delta: 383.8 MB). Free memory was 175.9 MB in the beginning and 330.7 MB in the end (delta: -154.8 MB). Peak memory consumption was 230.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:26:53,346 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 210.8 MB. Free memory is still 191.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.75 ms. Allocated memory is still 210.8 MB. Free memory was 190.4 MB in the beginning and 188.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.52 ms. Allocated memory is still 210.8 MB. Free memory was 188.9 MB in the beginning and 187.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 243.98 ms. Allocated memory is still 210.8 MB. Free memory was 187.9 MB in the beginning and 176.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 469543.79 ms. Allocated memory was 210.8 MB in the beginning and 594.5 MB in the end (delta: 383.8 MB). Free memory was 175.9 MB in the beginning and 330.7 MB in the end (delta: -154.8 MB). Peak memory consumption was 230.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...